2 * Copyright (C) 2013-2018 Robin Gareus <robin@gareus.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 #ifndef __ardour_transcode_ffmpeg_h__
19 #define __ardour_transcode_ffmpeg_h__
22 #include "ardour/system_exec.h"
23 #include "ardour/types.h"
26 /** @class TranscodeFfmpeg
27 * @brief wrapper around ffmpeg and ffprobe command-line utils
29 * This class includes parsers for stdi/o communication with
30 * 'ffmpeg' and 'ffprobe' and provide an abstraction to
31 * transcode video-files and extract aufio tracks and query
34 class TranscodeFfmpeg : public sigc::trackable
35 , public PBD::ScopedConnectionList
39 struct FFAudioStream {
41 std::string stream_id;
44 typedef std::vector<FFAudioStream> FFAudioStreams;
45 typedef std::map<std::string,std::string> FFSettings;
48 /** instantiate a new transcoder. If a file-name is given, the file's
49 * attributes (fps, duration, geometry etc) are read.
51 * @param f path to the video-file to probe or use as input for \ref extract_audio and \ref transcode .
53 TranscodeFfmpeg (std::string f);
54 virtual ~TranscodeFfmpeg ();
56 /** transcode to (import a video-file)
58 * @param outfile full-path (incl. file-extension) of the file to create
59 * @param width video-width, if \c <0 no scaling
60 * @param height video-height, with \c <0 preserve aspect (\p width \c / \c aspect-ratio)
61 * @param kbitps video bitrate, with \c 0 calculate to use 0.7 bits per pixel on average
62 * @return \c true if the transcoder process was successfully started.
64 bool transcode (std::string outfile, const int width=0, const int height=0, const int kbitps =0);
66 /** Extract an audio track from the given input file to a new 32bit float little-endian PCM WAV file.
67 * @param outfile full-path (incl. file-extension) to .wav file to write
68 * @param samplerate target samplerate
69 * @param stream Stream-ID of the audio-track to extract
70 * specified as element-number in \ref get_audio().
71 * @return \c true if the transcoder process was successfully started.
73 bool extract_audio (std::string outfile, ARDOUR::samplecnt_t samplerate, unsigned int stream=0);
75 /** transcode video and mux audio files into a new video-file.
76 * @param outfile full-path of output file to create (existing files are overwritten)
77 * @param inf_a filename of input audio-file
78 * @param inf_v filename of input video-file
79 * @param ffs additional command-line parameters for 'ffmpeg'. key/value pairs
80 * eg ffs["-vcodec"] = "mpeg4"
81 * @param meta additional meta-data results in -metadata "<key>"="<value>" command-line
83 * @param map if set to \c true stream mapping from input streams to output streams is set to use
84 * only the first available stream from the audio & video file (-map 0.0 -map 1.0).
85 * @return \c true if the encoder process was successfully started.
87 bool encode (std::string outfile, std::string inf_a, std::string inf_v, FFSettings ffs, FFSettings meta, bool map = true);
89 /** @return array with default encoder settings */
90 FFSettings default_encoder_settings ();
91 /** @return array with default meta data */
92 FFSettings default_meta_data ();
93 /** abort any running transcoding process */
96 * @return \c true if the input file was parsed correctly on class creation. */
97 bool probe_ok () { return probeok; }
98 /** @return \c true if the ffmpeg/ffparse executables are avail on this system */
99 bool ffexec_ok () { return ffexecok; }
101 /** signal emitted when ffmpeg reports progress updates
102 * during \ref encode \ref transcode and \ref extract_audio
103 * The parameters are current and last video-frame.
105 PBD::Signal2<void, ARDOUR::samplecnt_t, ARDOUR::samplecnt_t> Progress;
106 /** signal emitted when the transcoder process terminates. */
107 PBD::Signal0<void> Finished;
109 double get_fps () { return m_fps; }
110 double get_aspect () { return m_aspect; }
111 int get_width() { return m_width; }
112 int get_height() { return m_height; }
113 ARDOUR::samplecnt_t get_duration() { return m_duration; }
114 std::string get_codec() { return m_codec; }
116 FFAudioStreams get_audio() { return m_audio; }
118 /** override file duration used with the \ref Progress signal.
119 * @param d duration in video-frames = length_in_seconds * get_fps()
121 void set_duration(ARDOUR::samplecnt_t d) { m_duration = d; }
123 /* offset, lead-in/out are in seconds */
124 void set_avoffset(double av_offset) { m_avoffset = av_offset; }
125 void set_leadinout(double lead_in, double lead_out) { m_lead_in = lead_in; m_lead_out = lead_out; }
127 void set_fps(double fps) { m_fps = fps; } // on export, used for rounding only.
129 #if 1 /* tentative debug mode */
130 void set_debug (bool onoff) { debug_enable = onoff; }
134 ARDOUR::SystemExec *ffcmd;
141 ARDOUR::samplecnt_t m_duration;
153 FFAudioStreams m_audio;
155 void ffmpegparse_v (std::string d, size_t s);
156 void ffmpegparse_a (std::string d, size_t s);
157 void ffprobeparse (std::string d, size_t s);
159 std::string ffoutput;
161 std::string ffmpeg_exe;
162 std::string ffprobe_exe;
163 #if 1 /* tentative debug mode */
168 #endif /* __ardour_transcode_ffmpeg_h__ */