2 Copyright (C) 2016-2018 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 "caption_content.h"
27 #include "audio_processor.h"
30 #include "audio_analysis.h"
31 #include "compose.hpp"
33 #include <dcp/raw_convert.h>
34 #include <boost/foreach.hpp>
35 #include <boost/algorithm/string.hpp>
46 using boost::shared_ptr;
47 using boost::optional;
50 get_hints (shared_ptr<const Film> film)
54 ContentList content = film->content ();
56 bool big_font_files = false;
57 if (film->interop ()) {
58 BOOST_FOREACH (shared_ptr<Content> i, content) {
59 BOOST_FOREACH (shared_ptr<CaptionContent> j, i->caption) {
60 BOOST_FOREACH (shared_ptr<Font> k, j->fonts()) {
61 for (int l = 0; l < FontFiles::VARIANTS; ++l) {
62 optional<boost::filesystem::path> const p = k->file (static_cast<FontFiles::Variant>(l));
63 if (p && boost::filesystem::file_size (p.get()) >= (640 * 1024)) {
64 big_font_files = true;
73 hints.push_back (_("You have specified a font file which is larger than 640kB. This is very likely to cause problems on playback."));
76 if (film->audio_channels() < 6) {
77 hints.push_back (_("Your DCP has fewer than 6 audio channels. This may cause problems on some projectors."));
80 AudioProcessor const * ap = film->audio_processor();
81 if (ap && (ap->id() == "stereo-5.1-upmix-a" || ap->id() == "stereo-5.1-upmix-b")) {
82 hints.push_back (_("You are using DCP-o-matic's stereo-to-5.1 upmixer. This is experimental and may result in poor-quality audio. If you continue, you should listen to the resulting DCP in a cinema to make sure that it sounds good."));
85 int flat_or_narrower = 0;
87 BOOST_FOREACH (shared_ptr<const Content> i, content) {
89 Ratio const * r = i->video->scale().ratio ();
90 if (r && r->id() == "239") {
92 } else if (r && r->id() != "239" && r->id() != "190") {
98 string const film_container = film->container()->id();
100 if (scope && !flat_or_narrower && film_container == "185") {
101 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."));
104 if (!scope && flat_or_narrower && film_container == "239") {
105 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."));
108 if (film_container != "185" && film_container != "239" && film_container != "190") {
109 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"));
112 if (film->j2k_bandwidth() >= 245000000) {
113 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."));
116 if (film->interop() && film->video_frame_rate() != 24 && film->video_frame_rate() != 48) {
117 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.");
119 pair<double, double> range24 = film->speed_up_range (24);
120 pair<double, double> range48 = film->speed_up_range (48);
121 pair<double, double> range (max (range24.first, range48.first), min (range24.second, range48.second));
123 if (range.second > (29.0/24)) {
125 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.");
126 } else if (range.first < (24.0/29)) {
128 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.");
130 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).");
136 optional<double> lowest_speed_up;
137 optional<double> highest_speed_up;
138 BOOST_FOREACH (shared_ptr<const Content> i, content) {
139 double spu = film->active_frame_rate_change(i->position()).speed_up;
140 if (!lowest_speed_up || spu < *lowest_speed_up) {
141 lowest_speed_up = spu;
143 if (!highest_speed_up || spu > *highest_speed_up) {
144 highest_speed_up = spu;
148 double worst_speed_up = 1;
149 if (highest_speed_up) {
150 worst_speed_up = *highest_speed_up;
152 if (lowest_speed_up) {
153 worst_speed_up = max (worst_speed_up, 1 / *lowest_speed_up);
156 if (worst_speed_up > 25.5/24.0) {
157 hints.push_back (_("There is a large difference between the frame rate of your DCP and that of some of your content. This will cause your audio to play back at a much lower or higher pitch than it should. You are advised to set your DCP frame rate to one closer to your content, provided that your target projection systems support your chosen DCP rate."));
161 BOOST_FOREACH (shared_ptr<const Content> i, content) {
162 if (boost::algorithm::starts_with (i->path(0).filename().string(), "VTS_")) {
168 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));
172 BOOST_FOREACH (shared_ptr<const Content> i, content) {
173 if (i->video && i->video->frame_type() != VIDEO_FRAME_TYPE_2D) {
178 if (three_d > 0 && !film->three_d()) {
179 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.)"));
182 boost::filesystem::path path = film->audio_analysis_path (film->playlist ());
183 if (boost::filesystem::exists (path)) {
185 shared_ptr<AudioAnalysis> an (new AudioAnalysis (path));
189 vector<AudioAnalysis::PeakTime> sample_peak = an->sample_peak ();
190 vector<float> true_peak = an->true_peak ();
192 for (size_t i = 0; i < sample_peak.size(); ++i) {
193 float const peak = max (sample_peak[i].peak, true_peak.empty() ? 0 : true_peak[i]);
194 float const peak_dB = 20 * log10 (peak) + an->gain_correction (film->playlist ());
196 ch += dcp::raw_convert<string> (short_audio_channel_name (i)) + ", ";
200 ch = ch.substr (0, ch.length() - 2);
205 _("Your audio level is very high (on %1). You should reduce the gain of your audio content."),
210 } catch (OldFormatError& e) {
211 /* The audio analysis is too old to load in; just skip this hint as if
212 it had never been run.