2 Copyright (C) 2016-2017 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
25 #include "video_content.h"
26 #include "subtitle_content.h"
29 #include "audio_analysis.h"
30 #include "compose.hpp"
32 #include <dcp/raw_convert.h>
33 #include <boost/foreach.hpp>
34 #include <boost/algorithm/string.hpp>
45 using boost::shared_ptr;
46 using boost::optional;
49 get_hints (shared_ptr<const Film> film)
53 ContentList content = film->content ();
55 bool big_font_files = false;
56 if (film->interop ()) {
57 BOOST_FOREACH (shared_ptr<Content> i, content) {
59 BOOST_FOREACH (shared_ptr<Font> j, i->subtitle->fonts ()) {
60 for (int k = 0; k < FontFiles::VARIANTS; ++k) {
61 optional<boost::filesystem::path> const p = j->file (static_cast<FontFiles::Variant> (k));
62 if (p && boost::filesystem::file_size (p.get()) >= (640 * 1024)) {
63 big_font_files = true;
72 hints.push_back (_("You have specified a font file which is larger than 640kB. This is very likely to cause problems on playback."));
75 if (film->audio_channels() < 6) {
76 hints.push_back (_("Your DCP has fewer than 6 audio channels. This may cause problems on some projectors."));
79 int flat_or_narrower = 0;
81 BOOST_FOREACH (shared_ptr<const Content> i, content) {
83 Ratio const * r = i->video->scale().ratio ();
84 if (r && r->id() == "239") {
86 } else if (r && r->id() != "239" && r->id() != "full-frame") {
92 string const film_container = film->container()->id();
94 if (scope && !flat_or_narrower && film_container == "185") {
95 hints.push_back (_("All of your content is in Scope (2.39:1) but your DCP's container is Flat (1.85:1). This will letter-box your content inside a Flat (1.85:1) frame. You may prefer to set your DCP's container to Scope (2.39:1) in the \"DCP\" tab."));
98 if (!scope && flat_or_narrower && film_container == "239") {
99 hints.push_back (_("All of your content is at 1.85:1 or narrower but your DCP's container is Scope (2.39:1). This will pillar-box your content inside a Flat (1.85:1) frame. You may prefer to set your DCP's container to Flat (1.85:1) in the \"DCP\" tab."));
102 if (film_container != "185" && film_container != "239" && film_container != "full-frame") {
103 hints.push_back (_("Your DCP uses an unusual container ratio. This may cause problems on some projectors. If possible, use Flat or Scope for the DCP container ratio"));
106 if (film->j2k_bandwidth() >= 245000000) {
107 hints.push_back (_("A few projectors have problems playing back very high bit-rate DCPs. It is a good idea to drop the JPEG2000 bandwidth down to about 200Mbit/s; this is unlikely to have any visible effect on the image."));
110 if (film->interop() && film->video_frame_rate() != 24 && film->video_frame_rate() != 48) {
111 string base = _("You are set up for an Interop DCP at a frame rate which is not officially supported. You are advised either to change the frame rate of your DCP or to make a SMPTE DCP instead.");
113 pair<double, double> range24 = film->speed_up_range (24);
114 pair<double, double> range48 = film->speed_up_range (48);
115 pair<double, double> range (max (range24.first, range48.first), min (range24.second, range48.second));
117 if (range.second > (29.0/24)) {
119 h += _("However, setting your DCP frame rate to 24 or 48 will cause a significant speed-up of your content, and SMPTE DCPs are not supported by all projectors.");
120 } else if (range.first < (24.0/29)) {
122 h += _("However, setting your DCP frame rate to 24 or 48 will cause a significant slowdown of your content, and SMPTE DCPs are not supported by all projectors.");
124 h = _("You are set up for an Interop DCP at a frame rate which is not officially supported. You are advised either to change the frame rate of your DCP or to make a SMPTE DCP instead (although SMPTE DCPs are not supported by all projectors).");
131 BOOST_FOREACH (shared_ptr<const Content> i, content) {
132 if (boost::algorithm::starts_with (i->path(0).filename().string(), "VTS_")) {
138 hints.push_back (String::compose (_("You have %1 files that look like they are VOB files from DVD. You should join them to ensure smooth joins between the files."), vob));
142 BOOST_FOREACH (shared_ptr<const Content> i, content) {
143 if (i->video && i->video->frame_type() != VIDEO_FRAME_TYPE_2D) {
148 if (three_d > 0 && !film->three_d()) {
149 hints.push_back (_("You are using 3D content but your DCP is set to 2D. Set the DCP to 3D if you want to play it back on a 3D system (e.g. Real-D, MasterImage etc.)"));
152 boost::filesystem::path path = film->audio_analysis_path (film->playlist ());
153 if (boost::filesystem::exists (path)) {
155 shared_ptr<AudioAnalysis> an (new AudioAnalysis (path));
159 vector<AudioAnalysis::PeakTime> sample_peak = an->sample_peak ();
160 vector<float> true_peak = an->true_peak ();
162 for (size_t i = 0; i < sample_peak.size(); ++i) {
163 float const peak = max (sample_peak[i].peak, true_peak.empty() ? 0 : true_peak[i]);
164 float const peak_dB = 20 * log10 (peak) + an->gain_correction (film->playlist ());
166 ch += dcp::raw_convert<string> (short_audio_channel_name (i)) + ", ";
170 ch = ch.substr (0, ch.length() - 2);
175 _("Your audio level is very high (on %1). You should reduce the gain of your audio content."),
180 } catch (OldFormatError& e) {
181 /* The audio analysis is too old to load in; just skip this hint as if
182 it had never been run.