Replace String::compose with fmt.

sed -i "/Plural-Forms/n;/%100/n;/scanf/n;s/%[123456789]/{}/g" src/lib/*.cc src/lib/*.h src/wx/*.cc src/tools/*.cc src/lib/po/*.po src/wx/po/*.po src/tools/po/*.po test/*.cc
sed -i "s/String::compose */fmt::format/g" src/lib/*.cc src/lib/*.h src/wx/*.cc src/tools/*.cc test/*.cc

34 files changed, 133 insertions, 133 deletions

diff --git a/src/wx/about_dialog.cc b/src/wx/about_dialog.cc
index 2abf0ef17..c4cbde70a 100644
--- a/src/wx/about_dialog.cc
+++ b/src/wx/about_dialog.cc
@@ -61,9 +61,9 @@ AboutDialog::AboutDialog(wxWindow* parent)
 
 	wxString s;
 	if (strcmp(dcpomatic_git_commit, "release") == 0) {
-		t = new StaticText(this, std_to_wx(String::compose("Version %1", dcpomatic_version)));
+		t = new StaticText(this, std_to_wx(fmt::format("Version {}", dcpomatic_version)));
 	} else {
-		t = new StaticText(this, std_to_wx(String::compose("Version %1 git %2", dcpomatic_version, dcpomatic_git_commit)));
+		t = new StaticText(this, std_to_wx(fmt::format("Version {} git {}", dcpomatic_version, dcpomatic_git_commit)));
 	}
 	t->SetFont(version_font);
 	sizer->Add(t, wxSizerFlags().Centre().Border(wxALL, 2));
diff --git a/src/wx/audio_plot.cc b/src/wx/audio_plot.cc
index ad478ddd0..d1d9b9769 100644
--- a/src/wx/audio_plot.cc
+++ b/src/wx/audio_plot.cc
@@ -197,7 +197,7 @@ AudioPlot::paint ()
 		int const y = (metrics.height - (i - _minimum) * metrics.y_scale) - metrics.y_origin;
 		h_grid.MoveToPoint (metrics.db_label_width - 4, y);
 		h_grid.AddLineToPoint (metrics.db_label_width + data_width, y);
-		gc->DrawText (std_to_wx (String::compose ("%1dB", i)), 0, y - (db_label_height / 2));
+		gc->DrawText (std_to_wx (fmt::format("{}dB", i)), 0, y - (db_label_height / 2));
 	}
 
 	wxColour const grid_colour = gui_is_dark() ? wxColour(80, 80, 80) : wxColour(200, 200, 200);
diff --git a/src/wx/barco_alchemy_certificate_panel.cc b/src/wx/barco_alchemy_certificate_panel.cc
index 34b2aa82e..f5475fa76 100644
--- a/src/wx/barco_alchemy_certificate_panel.cc
+++ b/src/wx/barco_alchemy_certificate_panel.cc
@@ -61,8 +61,8 @@ BarcoAlchemyCertificatePanel::do_download ()
 {
 	string serial = wx_to_std (_serial->GetValue());
 	trim(serial);
-	string url = String::compose (
-		"sftp://%1:%2@certificates.barco.com/%3xxx/%4/Barco-ICMP.%5_cert.pem",
+	string url = fmt::format(
+		"sftp://{}:{}@certificates.barco.com/{}xxx/{}/Barco-ICMP.{}_cert.pem",
 		Config::instance()->barco_username().get(),
 		Config::instance()->barco_password().get(),
 		serial.substr(0, 7),
diff --git a/src/wx/christie_certificate_panel.cc b/src/wx/christie_certificate_panel.cc
index 3536f5045..1218657f7 100644
--- a/src/wx/christie_certificate_panel.cc
+++ b/src/wx/christie_certificate_panel.cc
@@ -50,8 +50,8 @@ ChristieCertificatePanel::ChristieCertificatePanel (DownloadCertificateDialog* d
 void
 ChristieCertificatePanel::do_download ()
 {
-	string const prefix = String::compose(
-		"ftp://%1:%2@certificates.christiedigital.com/Certificates/",
+	string const prefix = fmt::format(
+		"ftp://{}:{}@certificates.christiedigital.com/Certificates/",
 		Config::instance()->christie_username().get(),
 		Config::instance()->christie_password().get()
 		);
@@ -59,7 +59,7 @@ ChristieCertificatePanel::do_download ()
 	string serial = wx_to_std (_serial->GetValue());
 	serial.insert (0, 12 - serial.length(), '0');
 
-	string const url = String::compose ("%1F-IMB/F-IMB_%2_sha256.pem", prefix, serial);
+	string const url = fmt::format("{}F-IMB/F-IMB_{}_sha256.pem", prefix, serial);
 
 	optional<string> all_errors;
 	bool ok = true;
@@ -68,7 +68,7 @@ ChristieCertificatePanel::do_download ()
 	if (error) {
 		all_errors = *error;
 
-		auto const url = String::compose ("%1IMB-S2/IMB-S2_%2_sha256.pem", prefix, serial);
+		auto const url = fmt::format("{}IMB-S2/IMB-S2_{}_sha256.pem", prefix, serial);
 
 		error = get_from_url (url, true, false, boost::bind(&DownloadCertificatePanel::load_certificate_from_chain, this, _1, _2));
 		if (error) {
diff --git a/src/wx/closed_captions_dialog.cc b/src/wx/closed_captions_dialog.cc
index b8618c0cd..e95da4863 100644
--- a/src/wx/closed_captions_dialog.cc
+++ b/src/wx/closed_captions_dialog.cc
@@ -254,7 +254,7 @@ ClosedCaptionsDialog::update_tracks (shared_ptr<const Film> film)
 
 	_track->Clear ();
 	for (auto const& i: _tracks) {
-		_track->Append(std_to_wx(String::compose("%1 (%2)", i.name, i.language ? i.language->as_string() : wx_to_std(_("Unknown")))));
+		_track->Append(std_to_wx(fmt::format("{} ({})", i.name, i.language ? i.language->as_string() : wx_to_std(_("Unknown")))));
 	}
 
 	if (_track->GetCount() > 0) {
diff --git a/src/wx/dolby_doremi_certificate_panel.cc b/src/wx/dolby_doremi_certificate_panel.cc
index 24d8eb31a..4ddb8fc8f 100644
--- a/src/wx/dolby_doremi_certificate_panel.cc
+++ b/src/wx/dolby_doremi_certificate_panel.cc
@@ -66,28 +66,28 @@ DolbyDoremiCertificatePanel::DolbyDoremiCertificatePanel (DownloadCertificateDia
 static void
 try_common(vector<Location>& locations, string prefix, string serial)
 {
-	auto files = ls_url(String::compose("%1%2xxx/", prefix, serial.substr(0, 3)));
+	auto files = ls_url(fmt::format("{}{}xxx/", prefix, serial.substr(0, 3)));
 
 	auto check = [&locations, prefix, files, serial](string format, string file) {
-		auto const zip = String::compose(format, serial);
+		auto const zip = fmt::format(format, serial);
 		if (find(files.begin(), files.end(), zip) != files.end()) {
 			locations.push_back({
-				String::compose("%1%2xxx/%3", prefix, serial.substr(0, 3), zip),
-				String::compose(file, serial)
+				fmt::format("{}{}xxx/{}", prefix, serial.substr(0, 3), zip),
+				fmt::format(file, serial)
 			});
 		}
 	};
 
-	check("Dolby-DCP2000-%1.dcicerts.zip", "Dolby-DCP2000-%1.cert.sha256.pem");
-	check("Dolby-DCP2000-%1.certs.zip", "Dolby-DCP2000-%1.cert.sha256.pem");
-	check("dcp2000-%1.dcicerts.zip", "dcp2000-%1.cert.sha256.pem");
-	check("dcp2000-%1.certs.zip", "dcp2000-%1.cert.sha256.pem");
-	check("Dolby-IMB-%1.dcicerts.zip", "Dolby-IMB-%1.cert.sha256.pem");
-	check("imb-%1.dcicerts.zip", "imb-%1.cert.sha256.pem");
-	check("Dolby-IMS1000-%1.dcicerts.zip", "Dolby-IMS1000-%1.cert.sha256.pem");
-	check("Dolby-IMS2000-%1.dcicerts.zip", "Dolby-IMS2000-%1.cert.sha256.pem");
-	check("cert_Dolby-IMS3000-%1-SMPTE.zip", "cert_Dolby-IMS3000-%1-SMPTE.pem");
-	check("ims-%1.dcicerts.zip", "ims-%1.cert.sha256.pem");
+	check("Dolby-DCP2000-{}.dcicerts.zip", "Dolby-DCP2000-{}.cert.sha256.pem");
+	check("Dolby-DCP2000-{}.certs.zip", "Dolby-DCP2000-{}.cert.sha256.pem");
+	check("dcp2000-{}.dcicerts.zip", "dcp2000-{}.cert.sha256.pem");
+	check("dcp2000-{}.certs.zip", "dcp2000-{}.cert.sha256.pem");
+	check("Dolby-IMB-{}.dcicerts.zip", "Dolby-IMB-{}.cert.sha256.pem");
+	check("imb-{}.dcicerts.zip", "imb-{}.cert.sha256.pem");
+	check("Dolby-IMS1000-{}.dcicerts.zip", "Dolby-IMS1000-{}.cert.sha256.pem");
+	check("Dolby-IMS2000-{}.dcicerts.zip", "Dolby-IMS2000-{}.cert.sha256.pem");
+	check("cert_Dolby-IMS3000-{}-SMPTE.zip", "cert_Dolby-IMS3000-{}-SMPTE.pem");
+	check("ims-{}.dcicerts.zip", "ims-{}.cert.sha256.pem");
 }
 
 
@@ -103,12 +103,12 @@ try_cat862(vector<Location>& locations, string prefix, string serial)
 		cat862 = "CAT862_617000_and_higher";
 	} else {
 		int const lower = serial_int - (serial_int % 1000);
-		cat862 = String::compose ("CAT862_%1-%2", lower, lower + 999);
+		cat862 = fmt::format("CAT862_{}-{}", lower, lower + 999);
 	}
 
 	locations.push_back({
-		String::compose("%1%2/cert_Dolby256-CAT862-%3.zip", prefix, cat862, serial_int),
-		String::compose("cert_Dolby256-CAT862-%1.pem.crt", serial_int)
+		fmt::format("{}{}/cert_Dolby256-CAT862-{}.zip", prefix, cat862, serial_int),
+		fmt::format("cert_Dolby256-CAT862-{}.pem.crt", serial_int)
 	});
 }
 
@@ -125,12 +125,12 @@ try_dsp100(vector<Location>& locations, string prefix, string serial)
 		dsp100 = "DSP100_3000_and_higher";
 	} else {
 		int const lower = serial_int - (serial_int % 1000);
-		dsp100 = String::compose ("DSP100_%1_thru_%2", lower, lower + 999);
+		dsp100 = fmt::format("DSP100_{}_thru_{}", lower, lower + 999);
 	}
 
 	locations.push_back({
-		String::compose("%1%2/cert_Dolby256-DSP100-%3.zip", prefix, dsp100, serial_int),
-		String::compose("cert_Dolby256-DSP100-%1.pem.crt", serial_int)
+		fmt::format("{}{}/cert_Dolby256-DSP100-{}.zip", prefix, dsp100, serial_int),
+		fmt::format("cert_Dolby256-DSP100-{}.pem.crt", serial_int)
 	});
 }
 
@@ -147,12 +147,12 @@ try_cat745(vector<Location>& locations, string prefix, string serial)
 		cat745 = "CAT745_6000_and_higher";
 	} else {
 		int const lower = serial_int - (serial_int % 1000);
-		cat745 = String::compose("CAT745_%1_thru_%2", lower, lower + 999);
+		cat745 = fmt::format("CAT745_{}_thru_{}", lower, lower + 999);
 	}
 
 	locations.push_back({
-		String::compose("%1%2/cert_Dolby-CAT745-%3.zip", prefix, cat745, serial_int),
-		String::compose("cert_Dolby-CAT745-%1.pem.crt", serial_int)
+		fmt::format("{}{}/cert_Dolby-CAT745-{}.zip", prefix, cat745, serial_int),
+		fmt::format("cert_Dolby-CAT745-{}.pem.crt", serial_int)
 	});
 }
 
@@ -164,8 +164,8 @@ try_cp850(vector<Location>& locations, string prefix, string serial)
 
 	int const lower = serial_int - (serial_int % 1000);
 	locations.push_back({
-		String::compose ("%1CP850_CAT1600_F%2-F%3/cert_RMB_SPB_MDE_FMA.Dolby-CP850-F%4.zip", prefix, lower, lower + 999, serial_int),
-		String::compose ("cert_RMB_SPB_MDE_FMA.Dolby-CP850-F%1.pem.crt", serial_int)
+		fmt::format("{}CP850_CAT1600_F{}-F{}/cert_RMB_SPB_MDE_FMA.Dolby-CP850-F{}.zip", prefix, lower, lower + 999, serial_int),
+		fmt::format("cert_RMB_SPB_MDE_FMA.Dolby-CP850-F{}.pem.crt", serial_int)
 	});
 }
 
diff --git a/src/wx/download_certificate_panel.cc b/src/wx/download_certificate_panel.cc
index 8f826315d..1a3896773 100644
--- a/src/wx/download_certificate_panel.cc
+++ b/src/wx/download_certificate_panel.cc
@@ -64,7 +64,7 @@ DownloadCertificatePanel::load_certificate (boost::filesystem::path file, string
 		_certificate = dcp::Certificate (dcp::file_to_string(file));
 		_url = url;
 	} catch (dcp::MiscError& e) {
-		return String::compose(wx_to_std(_("Could not read certificate file (%1)")), e.what());
+		return fmt::format(wx_to_std(_("Could not read certificate file ({})")), e.what());
 	}
 	return {};
 }
@@ -77,7 +77,7 @@ DownloadCertificatePanel::load_certificate_from_chain (boost::filesystem::path f
 		_certificate = dcp::CertificateChain(dcp::file_to_string(file)).leaf();
 		_url = url;
 	} catch (dcp::MiscError& e) {
-		return String::compose(wx_to_std(_("Could not read certificate file (%1)")), e.what());
+		return fmt::format(wx_to_std(_("Could not read certificate file ({})")), e.what());
 	}
 	return {};
 }
diff --git a/src/wx/gdc_certificate_panel.cc b/src/wx/gdc_certificate_panel.cc
index 7e81c5a60..e937cff2a 100644
--- a/src/wx/gdc_certificate_panel.cc
+++ b/src/wx/gdc_certificate_panel.cc
@@ -56,8 +56,8 @@ GDCCertificatePanel::do_download ()
 {
 	string serial = wx_to_std (_serial->GetValue());
 	trim(serial);
-	string url = String::compose(
-		"ftp://%1:%2@ftp.gdc-tech.com/SHA256/%3.crt.pem",
+	string url = fmt::format(
+		"ftp://{}:{}@ftp.gdc-tech.com/SHA256/{}.crt.pem",
 		Config::instance()->gdc_username().get(),
 		Config::instance()->gdc_password().get(),
 		serial
diff --git a/src/wx/gl_video_view.cc b/src/wx/gl_video_view.cc
index 4ca5af21a..d1107f94f 100644
--- a/src/wx/gl_video_view.cc
+++ b/src/wx/gl_video_view.cc
@@ -109,7 +109,7 @@ GLVideoView::size_changed(wxSizeEvent const& ev)
 	int const width = std::round(ev.GetSize().GetWidth() * scale);
 	int const height = std::round(ev.GetSize().GetHeight() * scale);
 	_canvas_size = { width, height };
-	LOG_GENERAL("GLVideoView canvas size changed to %1x%2", width, height);
+	LOG_GENERAL("GLVideoView canvas size changed to {}x{}", width, height);
 	Sized();
 }
 
@@ -139,7 +139,7 @@ GLVideoView::check_for_butler_errors()
 		error_dialog(get(), wxString::Format(_("Could not read DCP: %s"), std_to_wx(e.what())));
 	}
 
-	LOG_DEBUG_PLAYER("Latency %1", _viewer->average_latency());
+	LOG_DEBUG_PLAYER("Latency {}", _viewer->average_latency());
 }
 
 
@@ -443,7 +443,7 @@ GLVideoView::setup_shaders()
 				log = string(log_char.data());
 			}
 			glDeleteShader(shader);
-			throw GLError(String::compose("Could not compile shader (%1)", log).c_str(), -1);
+			throw GLError(fmt::format("Could not compile shader ({})", log).c_str(), -1);
 		}
 		return shader;
 	};
@@ -471,7 +471,7 @@ GLVideoView::setup_shaders()
 			log = string(log_char.data());
 		}
 		glDeleteProgram(program);
-		throw GLError(String::compose("Could not link shader (%1)", log).c_str(), -1);
+		throw GLError(fmt::format("Could not link shader ({})", log).c_str(), -1);
 	}
 	glDeleteShader(vertex_shader);
 	glDeleteShader(fragment_shader);
diff --git a/src/wx/name_format_editor.cc b/src/wx/name_format_editor.cc
index ce0760486..f811871e3 100644
--- a/src/wx/name_format_editor.cc
+++ b/src/wx/name_format_editor.cc
@@ -45,7 +45,7 @@ NameFormatEditor::NameFormatEditor (wxWindow* parent, dcp::NameFormat name, dcp:
 
 	auto titles_sizer = new wxFlexGridSizer (2);
 	for (auto const& i: titles) {
-		auto t = new StaticText (_panel, std_to_wx (String::compose ("%%%1 %2", i.first, i.second)));
+		auto t = new StaticText (_panel, std_to_wx (fmt::format("%%{} {}", i.first, i.second)));
 		titles_sizer->Add(t, 1, wxRIGHT, DCPOMATIC_SIZER_X_GAP);
 		auto font = t->GetFont();
 		font.SetStyle (wxFONTSTYLE_ITALIC);
diff --git a/src/wx/player_information.cc b/src/wx/player_information.cc
index 9b8aafd18..da73ec933 100644
--- a/src/wx/player_information.cc
+++ b/src/wx/player_information.cc
@@ -178,8 +178,8 @@ PlayerInformation::triggered_update ()
 	vfr = dcp->video_frame_rate ();
 	DCPOMATIC_ASSERT (vfr);
 
-	auto const len = String::compose(
-		wx_to_std(_("Length: %1 (%2 frames)")),
+	auto const len = fmt::format(
+		wx_to_std(_("Length: {} ({} frames)")),
 		time_to_hmsf(dcp->full_length(_viewer.film()), lrint(*vfr)),
 		dcp->full_length(_viewer.film()).frames_round(*vfr)
 		);
diff --git a/src/wx/po/cs_CZ.po b/src/wx/po/cs_CZ.po
index 16f18f4a1..0b49a6588 100644
--- a/src/wx/po/cs_CZ.po
+++ b/src/wx/po/cs_CZ.po
@@ -1004,7 +1004,7 @@ msgstr "Nelze načíst DCP: %s"
 
 #: src/wx/download_certificate_panel.cc:67
 #: src/wx/download_certificate_panel.cc:80
-msgid "Could not read certificate file (%1)"
+msgid "Could not read certificate file ({})"
 msgstr "Nelze načíst soubor certifikátu (% 1)"
 
 #: src/wx/certificate_chain_editor.cc:195
@@ -1949,8 +1949,8 @@ msgid "Length"
 msgstr "Délka"
 
 #: src/wx/player_information.cc:182
-msgid "Length: %1 (%2 frames)"
-msgstr "Délka: %1 (%2 snímků)"
+msgid "Length: {} ({} frames)"
+msgstr "Délka: {} ({} snímků)"
 
 #: src/wx/text_panel.cc:104
 msgid "Line spacing"
diff --git a/src/wx/po/da_DK.po b/src/wx/po/da_DK.po
index fd71448b0..66ae5933b 100644
--- a/src/wx/po/da_DK.po
+++ b/src/wx/po/da_DK.po
@@ -94,7 +94,7 @@ msgstr ""
 #, fuzzy, c-format
 msgid "%s already exists as a file, so you cannot use it for a film."
 msgstr ""
-"%1 eksisterer allerede som en fil, så du kan ikke bruge det til en film."
+"{} eksisterer allerede som en fil, så du kan ikke bruge det til en film."
 
 #: src/wx/audio_dialog.cc:170 src/wx/audio_dialog.cc:172
 #, fuzzy, c-format
@@ -1033,7 +1033,7 @@ msgstr "Kunne ikke indlæse KDM"
 #: src/wx/download_certificate_panel.cc:67
 #: src/wx/download_certificate_panel.cc:80
 #, fuzzy
-msgid "Could not read certificate file (%1)"
+msgid "Could not read certificate file ({})"
 msgstr "Kunne ikke læse certifikatfil."
 
 #: src/wx/certificate_chain_editor.cc:195
@@ -1980,8 +1980,8 @@ msgid "Length"
 msgstr "Længde"
 
 #: src/wx/player_information.cc:182
-msgid "Length: %1 (%2 frames)"
-msgstr "Længde: %1 (%2 billeder)"
+msgid "Length: {} ({} frames)"
+msgstr "Længde: {} ({} billeder)"
 
 #: src/wx/text_panel.cc:104
 msgid "Line spacing"
@@ -3629,7 +3629,7 @@ msgid ""
 "The directory %s already exists and is not empty.  Are you sure you want to "
 "use it?"
 msgstr ""
-"Folderen %1 eksisterer allerede og er ikke tom.  Er du sikker på at du vil "
+"Folderen {} eksisterer allerede og er ikke tom.  Er du sikker på at du vil "
 "benytte den?"
 
 #: src/wx/try_unmount_dialog.cc:44
diff --git a/src/wx/po/de_DE.po b/src/wx/po/de_DE.po
index 3fd42efae..5b265b450 100644
--- a/src/wx/po/de_DE.po
+++ b/src/wx/po/de_DE.po
@@ -95,7 +95,7 @@ msgstr ""
 #, fuzzy, c-format
 msgid "%s already exists as a file, so you cannot use it for a film."
 msgstr ""
-"%1 existiert hier bereits als Dateiname, Sie müssen einen anderen Namen "
+"{} existiert hier bereits als Dateiname, Sie müssen einen anderen Namen "
 "wählen!"
 
 #: src/wx/audio_dialog.cc:170 src/wx/audio_dialog.cc:172
@@ -1060,7 +1060,7 @@ msgstr "Konnte KDM nicht laden"
 #: src/wx/download_certificate_panel.cc:67
 #: src/wx/download_certificate_panel.cc:80
 #, fuzzy
-msgid "Could not read certificate file (%1)"
+msgid "Could not read certificate file ({})"
 msgstr "Konnte die Zertifikatsdatei nicht lesen."
 
 #: src/wx/certificate_chain_editor.cc:195
@@ -2052,8 +2052,8 @@ msgid "Length"
 msgstr "Länge"
 
 #: src/wx/player_information.cc:182
-msgid "Length: %1 (%2 frames)"
-msgstr "Länge: %1 (%2 Bilder)"
+msgid "Length: {} ({} frames)"
+msgstr "Länge: {} ({} Bilder)"
 
 #: src/wx/text_panel.cc:104
 msgid "Line spacing"
@@ -3733,7 +3733,7 @@ msgid ""
 "The directory %s already exists and is not empty.  Are you sure you want to "
 "use it?"
 msgstr ""
-"Das Verzeichnis %1 existiert bereits und ist nicht leer. Wollen Sie es "
+"Das Verzeichnis {} existiert bereits und ist nicht leer. Wollen Sie es "
 "dennoch verwenden?"
 
 #: src/wx/try_unmount_dialog.cc:44
diff --git a/src/wx/po/es_ES.po b/src/wx/po/es_ES.po
index 02cec77d3..3123f9a60 100644
--- a/src/wx/po/es_ES.po
+++ b/src/wx/po/es_ES.po
@@ -93,7 +93,7 @@ msgstr "Preferencias DVD-o-matic"
 #: src/wx/film_name_location_dialog.cc:156
 #, fuzzy, c-format
 msgid "%s already exists as a file, so you cannot use it for a film."
-msgstr "%1 ya existe como fichero, no puede usarlo para una película."
+msgstr "{} ya existe como fichero, no puede usarlo para una película."
 
 #: src/wx/audio_dialog.cc:170 src/wx/audio_dialog.cc:172
 #, fuzzy, c-format
@@ -1036,7 +1036,7 @@ msgstr "No se pudo cargar la KDM."
 #: src/wx/download_certificate_panel.cc:67
 #: src/wx/download_certificate_panel.cc:80
 #, fuzzy
-msgid "Could not read certificate file (%1)"
+msgid "Could not read certificate file ({})"
 msgstr "No se pudo leer el fichero de certificado."
 
 #: src/wx/certificate_chain_editor.cc:195
@@ -1992,8 +1992,8 @@ msgid "Length"
 msgstr "Longitud"
 
 #: src/wx/player_information.cc:182
-msgid "Length: %1 (%2 frames)"
-msgstr "Longitud: %1 (%2 imágenes)"
+msgid "Length: {} ({} frames)"
+msgstr "Longitud: {} ({} imágenes)"
 
 #: src/wx/text_panel.cc:104
 msgid "Line spacing"
@@ -3651,7 +3651,7 @@ msgid ""
 "The directory %s already exists and is not empty.  Are you sure you want to "
 "use it?"
 msgstr ""
-"La carpeta %1 ya existe y no está vacía. ¿Está seguro de querer usarla?"
+"La carpeta {} ya existe y no está vacía. ¿Está seguro de querer usarla?"
 
 #: src/wx/try_unmount_dialog.cc:44
 #, c-format
diff --git a/src/wx/po/fa_IR.po b/src/wx/po/fa_IR.po
index 9ce33de2e..ae8472fac 100644
--- a/src/wx/po/fa_IR.po
+++ b/src/wx/po/fa_IR.po
@@ -1005,8 +1005,8 @@ msgstr "نمیتوان این دی سی پی را خواند: %s"
 
 #: src/wx/download_certificate_panel.cc:67
 #: src/wx/download_certificate_panel.cc:80
-msgid "Could not read certificate file (%1)"
-msgstr "نمیتوان این فایل گواهی نامه را خواند (%1)"
+msgid "Could not read certificate file ({})"
+msgstr "نمیتوان این فایل گواهی نامه را خواند ({})"
 
 #: src/wx/certificate_chain_editor.cc:195
 #: src/wx/certificate_chain_editor.cc:382 src/wx/recipient_dialog.cc:158
@@ -1948,8 +1948,8 @@ msgid "Length"
 msgstr "مدت"
 
 #: src/wx/player_information.cc:182
-msgid "Length: %1 (%2 frames)"
-msgstr "مدت: %1 (%2 فریم)"
+msgid "Length: {} ({} frames)"
+msgstr "مدت: {} ({} فریم)"
 
 #: src/wx/text_panel.cc:104
 msgid "Line spacing"
diff --git a/src/wx/po/fr_FR.po b/src/wx/po/fr_FR.po
index 49051c422..0fc3f22ee 100644
--- a/src/wx/po/fr_FR.po
+++ b/src/wx/po/fr_FR.po
@@ -1020,8 +1020,8 @@ msgstr "Impossible de lire le DCP : %s"
 
 #: src/wx/download_certificate_panel.cc:67
 #: src/wx/download_certificate_panel.cc:80
-msgid "Could not read certificate file (%1)"
-msgstr "Impossible de lire le fichier de certificat (%1)"
+msgid "Could not read certificate file ({})"
+msgstr "Impossible de lire le fichier de certificat ({})"
 
 #: src/wx/certificate_chain_editor.cc:195
 #: src/wx/certificate_chain_editor.cc:382 src/wx/recipient_dialog.cc:158
@@ -1975,8 +1975,8 @@ msgid "Length"
 msgstr "Durée"
 
 #: src/wx/player_information.cc:182
-msgid "Length: %1 (%2 frames)"
-msgstr "Durée : %1 (%2 images)"
+msgid "Length: {} ({} frames)"
+msgstr "Durée : {} ({} images)"
 
 #: src/wx/text_panel.cc:104
 msgid "Line spacing"
@@ -3626,7 +3626,7 @@ msgid ""
 "The directory %s already exists and is not empty.  Are you sure you want to "
 "use it?"
 msgstr ""
-"Le répertoire %1 existe déjà et n'est pas vide.  Êtes-vous sûr de vouloir "
+"Le répertoire {} existe déjà et n'est pas vide.  Êtes-vous sûr de vouloir "
 "l'utiliser ?"
 
 #: src/wx/try_unmount_dialog.cc:44
diff --git a/src/wx/po/hu_HU.po b/src/wx/po/hu_HU.po
index f7f1b1967..f9daf0ede 100644
--- a/src/wx/po/hu_HU.po
+++ b/src/wx/po/hu_HU.po
@@ -989,7 +989,7 @@ msgstr ""
 
 #: src/wx/download_certificate_panel.cc:67
 #: src/wx/download_certificate_panel.cc:80
-msgid "Could not read certificate file (%1)"
+msgid "Could not read certificate file ({})"
 msgstr ""
 
 #: src/wx/certificate_chain_editor.cc:195
@@ -1898,7 +1898,7 @@ msgid "Length"
 msgstr ""
 
 #: src/wx/player_information.cc:182
-msgid "Length: %1 (%2 frames)"
+msgid "Length: {} ({} frames)"
 msgstr ""
 
 #: src/wx/text_panel.cc:104
diff --git a/src/wx/po/it_IT.po b/src/wx/po/it_IT.po
index 7c0f1576a..b24292bda 100644
--- a/src/wx/po/it_IT.po
+++ b/src/wx/po/it_IT.po
@@ -93,7 +93,7 @@ msgstr "Preferenze DVD-o-matic"
 #: src/wx/film_name_location_dialog.cc:156
 #, fuzzy, c-format
 msgid "%s already exists as a file, so you cannot use it for a film."
-msgstr "%1 esiste già come file, quindi non puoi usarlo per il film."
+msgstr "{} esiste già come file, quindi non puoi usarlo per il film."
 
 #: src/wx/audio_dialog.cc:170 src/wx/audio_dialog.cc:172
 #, fuzzy, c-format
@@ -1035,7 +1035,7 @@ msgstr "Impossibile caricare la KDM (%s)"
 #: src/wx/download_certificate_panel.cc:67
 #: src/wx/download_certificate_panel.cc:80
 #, fuzzy
-msgid "Could not read certificate file (%1)"
+msgid "Could not read certificate file ({})"
 msgstr "Impossibile leggere il file del certificato."
 
 #: src/wx/certificate_chain_editor.cc:195
@@ -1983,8 +1983,8 @@ msgid "Length"
 msgstr "Lunghezza"
 
 #: src/wx/player_information.cc:182
-msgid "Length: %1 (%2 frames)"
-msgstr "Lunghezza: %1 (%2 fotogrammi)"
+msgid "Length: {} ({} frames)"
+msgstr "Lunghezza: {} ({} fotogrammi)"
 
 #: src/wx/text_panel.cc:104
 msgid "Line spacing"
@@ -3635,7 +3635,7 @@ msgstr ""
 msgid ""
 "The directory %s already exists and is not empty.  Are you sure you want to "
 "use it?"
-msgstr "La directory %1 esiste già e non è vuota. Sei sicuro di volerla usare?"
+msgstr "La directory {} esiste già e non è vuota. Sei sicuro di volerla usare?"
 
 #: src/wx/try_unmount_dialog.cc:44
 #, c-format
diff --git a/src/wx/po/nl_NL.po b/src/wx/po/nl_NL.po
index 1e4e0c5d2..514ce11fa 100644
--- a/src/wx/po/nl_NL.po
+++ b/src/wx/po/nl_NL.po
@@ -1018,8 +1018,8 @@ msgstr "Kan DCP niet lezen: %s"
 
 #: src/wx/download_certificate_panel.cc:67
 #: src/wx/download_certificate_panel.cc:80
-msgid "Could not read certificate file (%1)"
-msgstr "Kan certificaat-bestand niet lezen (%1)"
+msgid "Could not read certificate file ({})"
+msgstr "Kan certificaat-bestand niet lezen ({})"
 
 #: src/wx/certificate_chain_editor.cc:195
 #: src/wx/certificate_chain_editor.cc:382 src/wx/recipient_dialog.cc:158
@@ -1964,8 +1964,8 @@ msgid "Length"
 msgstr "Lengte"
 
 #: src/wx/player_information.cc:182
-msgid "Length: %1 (%2 frames)"
-msgstr "Lengte: %1 (%2 frames)"
+msgid "Length: {} ({} frames)"
+msgstr "Lengte: {} ({} frames)"
 
 #: src/wx/text_panel.cc:104
 msgid "Line spacing"
diff --git a/src/wx/po/pl_PL.po b/src/wx/po/pl_PL.po
index 4d28e391c..d703fcea8 100644
--- a/src/wx/po/pl_PL.po
+++ b/src/wx/po/pl_PL.po
@@ -95,7 +95,7 @@ msgstr ""
 #: src/wx/film_name_location_dialog.cc:156
 #, fuzzy, c-format
 msgid "%s already exists as a file, so you cannot use it for a film."
-msgstr "%1 istnieje już jako plik, więc nie możesz użyć go w Projekcie."
+msgstr "{} istnieje już jako plik, więc nie możesz użyć go w Projekcie."
 
 #: src/wx/audio_dialog.cc:170 src/wx/audio_dialog.cc:172
 #, fuzzy, c-format
@@ -1039,8 +1039,8 @@ msgstr "Nie udało się odczytać DCP: %s"
 
 #: src/wx/download_certificate_panel.cc:67
 #: src/wx/download_certificate_panel.cc:80
-msgid "Could not read certificate file (%1)"
-msgstr "Nie udało się odczytać pliku certyfikatu (%1)"
+msgid "Could not read certificate file ({})"
+msgstr "Nie udało się odczytać pliku certyfikatu ({})"
 
 #: src/wx/certificate_chain_editor.cc:195
 #: src/wx/certificate_chain_editor.cc:382 src/wx/recipient_dialog.cc:158
@@ -2002,8 +2002,8 @@ msgid "Length"
 msgstr "Długość"
 
 #: src/wx/player_information.cc:182
-msgid "Length: %1 (%2 frames)"
-msgstr "Długość: %1 (%2 klatki)"
+msgid "Length: {} ({} frames)"
+msgstr "Długość: {} ({} klatki)"
 
 #: src/wx/text_panel.cc:104
 msgid "Line spacing"
@@ -3679,7 +3679,7 @@ msgid ""
 "The directory %s already exists and is not empty.  Are you sure you want to "
 "use it?"
 msgstr ""
-"Lokalizacja %1 już istnieje i nie jest pusta. Na pewno chcesz jej użyć?"
+"Lokalizacja {} już istnieje i nie jest pusta. Na pewno chcesz jej użyć?"
 
 #: src/wx/try_unmount_dialog.cc:44
 #, fuzzy, c-format
diff --git a/src/wx/po/pt_BR.po b/src/wx/po/pt_BR.po
index 7244a5f21..ecd2ecdb6 100644
--- a/src/wx/po/pt_BR.po
+++ b/src/wx/po/pt_BR.po
@@ -94,7 +94,7 @@ msgstr ""
 #, fuzzy, c-format
 msgid "%s already exists as a file, so you cannot use it for a film."
 msgstr ""
-"%1 já existe como um arquivo, portanto você não pode usá-lo para um filme."
+"{} já existe como um arquivo, portanto você não pode usá-lo para um filme."
 
 #: src/wx/audio_dialog.cc:170 src/wx/audio_dialog.cc:172
 #, fuzzy, c-format
@@ -1040,7 +1040,7 @@ msgstr "Não foi possível carregar o KDM."
 #: src/wx/download_certificate_panel.cc:67
 #: src/wx/download_certificate_panel.cc:80
 #, fuzzy
-msgid "Could not read certificate file (%1)"
+msgid "Could not read certificate file ({})"
 msgstr "Não foi possível ler o arquivo de certificado."
 
 #: src/wx/certificate_chain_editor.cc:195
@@ -1994,8 +1994,8 @@ msgid "Length"
 msgstr "Duração"
 
 #: src/wx/player_information.cc:182
-msgid "Length: %1 (%2 frames)"
-msgstr "Duração: %1 (%2 quadros)"
+msgid "Length: {} ({} frames)"
+msgstr "Duração: {} ({} quadros)"
 
 #: src/wx/text_panel.cc:104
 msgid "Line spacing"
@@ -3654,7 +3654,7 @@ msgid ""
 "The directory %s already exists and is not empty.  Are you sure you want to "
 "use it?"
 msgstr ""
-"O diretório %1 já existe e não está vazio.  Tem certeza que deseja usá-lo?"
+"O diretório {} já existe e não está vazio.  Tem certeza que deseja usá-lo?"
 
 #: src/wx/try_unmount_dialog.cc:44
 #, c-format
diff --git a/src/wx/po/pt_PT.po b/src/wx/po/pt_PT.po
index c2aa17dfa..c92423725 100644
--- a/src/wx/po/pt_PT.po
+++ b/src/wx/po/pt_PT.po
@@ -1036,7 +1036,7 @@ msgstr "Não foi possível carregar a KDM (%s)"
 #: src/wx/download_certificate_panel.cc:67
 #: src/wx/download_certificate_panel.cc:80
 #, fuzzy
-msgid "Could not read certificate file (%1)"
+msgid "Could not read certificate file ({})"
 msgstr "Não foi possível ler o ficheiro do certificado (%s)"
 
 #: src/wx/certificate_chain_editor.cc:195
@@ -1994,7 +1994,7 @@ msgid "Length"
 msgstr ""
 
 #: src/wx/player_information.cc:182
-msgid "Length: %1 (%2 frames)"
+msgid "Length: {} ({} frames)"
 msgstr ""
 
 #: src/wx/text_panel.cc:104
diff --git a/src/wx/po/ru_RU.po b/src/wx/po/ru_RU.po
index d034e563c..d749408d5 100644
--- a/src/wx/po/ru_RU.po
+++ b/src/wx/po/ru_RU.po
@@ -1007,8 +1007,8 @@ msgstr "Не удалось прочитать DCP: %s"
 
 #: src/wx/download_certificate_panel.cc:67
 #: src/wx/download_certificate_panel.cc:80
-msgid "Could not read certificate file (%1)"
-msgstr "Не удалось прочитать файл сертификата (%1)"
+msgid "Could not read certificate file ({})"
+msgstr "Не удалось прочитать файл сертификата ({})"
 
 #: src/wx/certificate_chain_editor.cc:195
 #: src/wx/certificate_chain_editor.cc:382 src/wx/recipient_dialog.cc:158
@@ -1957,8 +1957,8 @@ msgid "Length"
 msgstr "Продолжительность"
 
 #: src/wx/player_information.cc:182
-msgid "Length: %1 (%2 frames)"
-msgstr "Продолжительность: %1 (%2 кадра(ов))"
+msgid "Length: {} ({} frames)"
+msgstr "Продолжительность: {} ({} кадра(ов))"
 
 #: src/wx/text_panel.cc:104
 msgid "Line spacing"
diff --git a/src/wx/po/sk_SK.po b/src/wx/po/sk_SK.po
index 5fc6c811c..bb10589a4 100644
--- a/src/wx/po/sk_SK.po
+++ b/src/wx/po/sk_SK.po
@@ -1041,7 +1041,7 @@ msgstr "Nemôžem načítať kDM (%s)"
 #: src/wx/download_certificate_panel.cc:67
 #: src/wx/download_certificate_panel.cc:80
 #, fuzzy
-msgid "Could not read certificate file (%1)"
+msgid "Could not read certificate file ({})"
 msgstr "Nemôžem načítať súbor s certifikátom (%s)"
 
 #: src/wx/certificate_chain_editor.cc:195
@@ -1999,7 +1999,7 @@ msgid "Length"
 msgstr ""
 
 #: src/wx/player_information.cc:182
-msgid "Length: %1 (%2 frames)"
+msgid "Length: {} ({} frames)"
 msgstr ""
 
 #: src/wx/text_panel.cc:104
diff --git a/src/wx/po/sl_SI.po b/src/wx/po/sl_SI.po
index e44585741..9a18bb1a5 100644
--- a/src/wx/po/sl_SI.po
+++ b/src/wx/po/sl_SI.po
@@ -93,7 +93,7 @@ msgstr ""
 #: src/wx/film_name_location_dialog.cc:156
 #, fuzzy, c-format
 msgid "%s already exists as a file, so you cannot use it for a film."
-msgstr "%1 že obstaja kot datoteka, zato je ne morete uporabiti za film."
+msgstr "{} že obstaja kot datoteka, zato je ne morete uporabiti za film."
 
 #: src/wx/audio_dialog.cc:170 src/wx/audio_dialog.cc:172
 #, fuzzy, c-format
@@ -1018,8 +1018,8 @@ msgstr "Ni bilo mogoče prebrati DCP: %s"
 
 #: src/wx/download_certificate_panel.cc:67
 #: src/wx/download_certificate_panel.cc:80
-msgid "Could not read certificate file (%1)"
-msgstr "Datoteke potrdila (%1) ni bilo mogoče prebrati"
+msgid "Could not read certificate file ({})"
+msgstr "Datoteke potrdila ({}) ni bilo mogoče prebrati"
 
 #: src/wx/certificate_chain_editor.cc:195
 #: src/wx/certificate_chain_editor.cc:382 src/wx/recipient_dialog.cc:158
@@ -1965,8 +1965,8 @@ msgid "Length"
 msgstr "Dolžina"
 
 #: src/wx/player_information.cc:182
-msgid "Length: %1 (%2 frames)"
-msgstr "Dolžina: %1 (%2 sličic)"
+msgid "Length: {} ({} frames)"
+msgstr "Dolžina: {} ({} sličic)"
 
 #: src/wx/text_panel.cc:104
 msgid "Line spacing"
@@ -3608,7 +3608,7 @@ msgid ""
 "The directory %s already exists and is not empty.  Are you sure you want to "
 "use it?"
 msgstr ""
-"Mapa %1 že obstaja in ni prazna.  Ali ste prepričani, da jo želite uporabiti?"
+"Mapa {} že obstaja in ni prazna.  Ali ste prepričani, da jo želite uporabiti?"
 
 #: src/wx/try_unmount_dialog.cc:44
 #, fuzzy, c-format
diff --git a/src/wx/po/sv_SE.po b/src/wx/po/sv_SE.po
index b6f34baf9..24a46f05f 100644
--- a/src/wx/po/sv_SE.po
+++ b/src/wx/po/sv_SE.po
@@ -94,7 +94,7 @@ msgstr "DVD-o-matic Inställningar"
 #, fuzzy, c-format
 msgid "%s already exists as a file, so you cannot use it for a film."
 msgstr ""
-"%1 finns redan som fil, så du kan inte använda det som namn på en film."
+"{} finns redan som fil, så du kan inte använda det som namn på en film."
 
 #: src/wx/audio_dialog.cc:170 src/wx/audio_dialog.cc:172
 #, fuzzy, c-format
@@ -1034,8 +1034,8 @@ msgstr "Kunde inte ladda DCP: %s"
 
 #: src/wx/download_certificate_panel.cc:67
 #: src/wx/download_certificate_panel.cc:80
-msgid "Could not read certificate file (%1)"
-msgstr "Kunde inte läsa certifikatfil (%1)"
+msgid "Could not read certificate file ({})"
+msgstr "Kunde inte läsa certifikatfil ({})"
 
 #: src/wx/certificate_chain_editor.cc:195
 #: src/wx/certificate_chain_editor.cc:382 src/wx/recipient_dialog.cc:158
@@ -1999,8 +1999,8 @@ msgid "Length"
 msgstr "Speltid"
 
 #: src/wx/player_information.cc:182
-msgid "Length: %1 (%2 frames)"
-msgstr "Speltid: %1 (%2 bildrutor)"
+msgid "Length: {} ({} frames)"
+msgstr "Speltid: {} ({} bildrutor)"
 
 #: src/wx/text_panel.cc:104
 msgid "Line spacing"
@@ -3666,7 +3666,7 @@ msgid ""
 "The directory %s already exists and is not empty.  Are you sure you want to "
 "use it?"
 msgstr ""
-"Mappen %1 finns redan och är inte tom. Är du säker på att du vill använda "
+"Mappen {} finns redan och är inte tom. Är du säker på att du vill använda "
 "den?"
 
 #: src/wx/try_unmount_dialog.cc:44
diff --git a/src/wx/po/tr_TR.po b/src/wx/po/tr_TR.po
index 07965be19..47fcfa76b 100644
--- a/src/wx/po/tr_TR.po
+++ b/src/wx/po/tr_TR.po
@@ -988,7 +988,7 @@ msgstr ""
 
 #: src/wx/download_certificate_panel.cc:67
 #: src/wx/download_certificate_panel.cc:80
-msgid "Could not read certificate file (%1)"
+msgid "Could not read certificate file ({})"
 msgstr ""
 
 #: src/wx/certificate_chain_editor.cc:195
@@ -1896,7 +1896,7 @@ msgid "Length"
 msgstr ""
 
 #: src/wx/player_information.cc:182
-msgid "Length: %1 (%2 frames)"
+msgid "Length: {} ({} frames)"
 msgstr ""
 
 #: src/wx/text_panel.cc:104
diff --git a/src/wx/po/uk_UA.po b/src/wx/po/uk_UA.po
index d280d2d0e..5f42ed5e1 100644
--- a/src/wx/po/uk_UA.po
+++ b/src/wx/po/uk_UA.po
@@ -92,7 +92,7 @@ msgstr ""
 #, fuzzy, c-format
 msgid "%s already exists as a file, so you cannot use it for a film."
 msgstr ""
-"%1 вже існує як файл, тому ви не можете використовувати його у проекті."
+"{} вже існує як файл, тому ви не можете використовувати його у проекті."
 
 #: src/wx/audio_dialog.cc:170 src/wx/audio_dialog.cc:172
 #, fuzzy, c-format
@@ -1038,7 +1038,7 @@ msgstr "Не вдалося завантажити KDM."
 #: src/wx/download_certificate_panel.cc:67
 #: src/wx/download_certificate_panel.cc:80
 #, fuzzy
-msgid "Could not read certificate file (%1)"
+msgid "Could not read certificate file ({})"
 msgstr "Не вдалося прочитати файл сертифікату."
 
 #: src/wx/certificate_chain_editor.cc:195
@@ -1991,8 +1991,8 @@ msgid "Length"
 msgstr "Тривалість"
 
 #: src/wx/player_information.cc:182
-msgid "Length: %1 (%2 frames)"
-msgstr "Тривалість: %1 (%2 frames)"
+msgid "Length: {} ({} frames)"
+msgstr "Тривалість: {} ({} frames)"
 
 #: src/wx/text_panel.cc:104
 msgid "Line spacing"
@@ -3644,7 +3644,7 @@ msgstr ""
 msgid ""
 "The directory %s already exists and is not empty.  Are you sure you want to "
 "use it?"
-msgstr "Папка %1 вже існує и не є пустою. Ви точно хочете використовувати її?"
+msgstr "Папка {} вже існує и не є пустою. Ви точно хочете використовувати її?"
 
 #: src/wx/try_unmount_dialog.cc:44
 #, c-format
diff --git a/src/wx/po/zh_CN.po b/src/wx/po/zh_CN.po
index d731275a7..377416d4d 100644
--- a/src/wx/po/zh_CN.po
+++ b/src/wx/po/zh_CN.po
@@ -1009,8 +1009,8 @@ msgstr "无法读取 DCP: %s"
 
 #: src/wx/download_certificate_panel.cc:67
 #: src/wx/download_certificate_panel.cc:80
-msgid "Could not read certificate file (%1)"
-msgstr "无法读取证书文件 (%1)"
+msgid "Could not read certificate file ({})"
+msgstr "无法读取证书文件 ({})"
 
 #: src/wx/certificate_chain_editor.cc:195
 #: src/wx/certificate_chain_editor.cc:382 src/wx/recipient_dialog.cc:158
@@ -1940,8 +1940,8 @@ msgid "Length"
 msgstr "长度"
 
 #: src/wx/player_information.cc:182
-msgid "Length: %1 (%2 frames)"
-msgstr "长度: %1 (%2 帧)"
+msgid "Length: {} ({} frames)"
+msgstr "长度: {} ({} 帧)"
 
 #: src/wx/text_panel.cc:104
 msgid "Line spacing"
diff --git a/src/wx/qube_certificate_panel.cc b/src/wx/qube_certificate_panel.cc
index de8fa8a49..5e098a047 100644
--- a/src/wx/qube_certificate_panel.cc
+++ b/src/wx/qube_certificate_panel.cc
@@ -51,7 +51,7 @@ QubeCertificatePanel::QubeCertificatePanel (DownloadCertificateDialog* dialog, s
 void
 QubeCertificatePanel::do_download ()
 {
-	auto files = ls_url(String::compose("%1SMPTE-%2/", base, _type));
+	auto files = ls_url(fmt::format("{}SMPTE-{}/", base, _type));
 	if (files.empty()) {
 		error_dialog (this, _("Could not read certificates from Qube server."));
 		return;
@@ -62,7 +62,7 @@ QubeCertificatePanel::do_download ()
 
 	optional<string> name;
 	for (auto i: files) {
-		if (boost::algorithm::starts_with(i, String::compose("%1-%2-", _type, serial))) {
+		if (boost::algorithm::starts_with(i, fmt::format("{}-{}-", _type, serial))) {
 			name = i;
 			break;
 		}
@@ -74,7 +74,7 @@ QubeCertificatePanel::do_download ()
 		return;
 	}
 
-	auto error = get_from_url (String::compose("%1SMPTE-%2/%3", base, _type, *name), true, false, boost::bind(&DownloadCertificatePanel::load_certificate, this, _1, _2));
+	auto error = get_from_url (fmt::format("{}SMPTE-{}/{}", base, _type, *name), true, false, boost::bind(&DownloadCertificatePanel::load_certificate, this, _1, _2));
 
 	if (error) {
 		_dialog->message()->SetLabel({});
diff --git a/src/wx/simple_video_view.cc b/src/wx/simple_video_view.cc
index 9038920ce..ff16b6146 100644
--- a/src/wx/simple_video_view.cc
+++ b/src/wx/simple_video_view.cc
@@ -166,7 +166,7 @@ SimpleVideoView::timer ()
 		return;
 	}
 
-	LOG_DEBUG_VIDEO_VIEW("%1 -> %2; delay %3", next.seconds(), _viewer->time().seconds(), max((next.seconds() - _viewer->time().seconds()) * 1000, 1.0));
+	LOG_DEBUG_VIDEO_VIEW("{} -> {}; delay {}", next.seconds(), _viewer->time().seconds(), max((next.seconds() - _viewer->time().seconds()) * 1000, 1.0));
 	_timer.Start (max(1, time_until_next_frame().get_value_or(0)), wxTIMER_ONE_SHOT);
 
 	if (_viewer->butler()) {
@@ -177,7 +177,7 @@ SimpleVideoView::timer ()
 		}
 	}
 
-	LOG_DEBUG_PLAYER("Latency %1", _viewer->average_latency());
+	LOG_DEBUG_PLAYER("Latency {}", _viewer->average_latency());
 }
 
 
diff --git a/src/wx/video_view.cc b/src/wx/video_view.cc
index c271cb65e..c658e3663 100644
--- a/src/wx/video_view.cc
+++ b/src/wx/video_view.cc
@@ -77,7 +77,7 @@ VideoView::get_next_frame (bool non_blocking)
 		Butler::Error e;
 		auto pv = butler->get_video (non_blocking ? Butler::Behaviour::NON_BLOCKING : Butler::Behaviour::BLOCKING, &e);
 		if (e.code == Butler::Error::Code::DIED) {
-			LOG_ERROR ("Butler died with %1", e.summary());
+			LOG_ERROR ("Butler died with {}", e.summary());
 		}
 		if (!pv.first) {
 			return e.code == Butler::Error::Code::AGAIN ? AGAIN : FAIL;
diff --git a/src/wx/wx_util.cc b/src/wx/wx_util.cc
index afea3b209..47f513276 100644
--- a/src/wx/wx_util.cc
+++ b/src/wx/wx_util.cc
@@ -651,7 +651,7 @@ bitmap_path (string name)
 wxString
 icon_path(string name)
 {
-	return gui_is_dark() ? bitmap_path(String::compose("%1_white.png", name)) : bitmap_path(String::compose("%1_black.png", name));
+	return gui_is_dark() ? bitmap_path(fmt::format("{}_white.png", name)) : bitmap_path(fmt::format("{}_black.png", name));
 }