A sample Dockerfile to use OpenH264 & FFmpeg from python codes.
$ docker build -t openh264-ffmpeg-py .
$ docker run --rm --mount type=bind,src=$(pwd)/movies,dst=/movies openh264-ffmpeg-py
original file info:
{'format': {'bit_rate': '3428852',
'duration': '6.016667',
'filename': '/movies/original.mov',
'format_long_name': 'QuickTime / MOV',
'format_name': 'mov,mp4,m4a,3gp,3g2,mj2',
'nb_programs': 0,
'nb_streams': 1,
'probe_score': 100,
'size': '2578783',
'start_time': '0.000000',
'tags': {'com.apple.quicktime.creationdate': '2020-04-03T12:04:59+0900',
'com.apple.quicktime.make': 'Apple',
'com.apple.quicktime.model': 'MacBookPro14,2',
'com.apple.quicktime.software': 'Mac OS X 10.15.3 (19D76)',
'compatible_brands': 'qt ',
'creation_time': '2020-04-03T03:04:59.000000Z',
'major_brand': 'qt ',
'minor_version': '0'}},
'streams': [{'avg_frame_rate': '60/1',
'bit_rate': '3370753',
'bits_per_raw_sample': '8',
'chroma_location': 'left',
'codec_long_name': 'H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10',
'codec_name': 'h264',
'codec_tag': '0x31637661',
'codec_tag_string': 'avc1',
'codec_time_base': '1/120',
'codec_type': 'video',
'coded_height': 736,
'coded_width': 2064,
'color_primaries': 'bt709',
'color_range': 'tv',
'color_space': 'bt709',
'color_transfer': 'bt709',
'display_aspect_ratio': '513:182',
'disposition': {'attached_pic': 0,
'clean_effects': 0,
'comment': 0,
'default': 1,
'dub': 0,
'forced': 0,
'hearing_impaired': 0,
'karaoke': 0,
'lyrics': 0,
'original': 0,
'timed_thumbnails': 0,
'visual_impaired': 0},
'duration': '6.016667',
'duration_ts': 36100,
'has_b_frames': 16,
'height': 728,
'index': 0,
'is_avc': 'true',
'level': 42,
'nal_length_size': '4',
'nb_frames': '363',
'pix_fmt': 'yuv420p',
'profile': 'Main',
'r_frame_rate': '60/1',
'refs': 1,
'sample_aspect_ratio': '1:1',
'start_pts': 0,
'start_time': '0.000000',
'tags': {'creation_time': '2020-04-03T03:04:59.000000Z',
'encoder': 'H.264',
'handler_name': 'Core Media Video',
'language': 'und'},
'time_base': '1/6000',
'width': 2052}]}
decode it to jpeg images
ffmpeg version n4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 8 (Debian 8.3.0-6)
configuration: --enable-libopenh264 --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx
libavutil 56. 31.100 / 56. 31.100
libavcodec 58. 54.100 / 58. 54.100
libavformat 58. 29.100 / 58. 29.100
libavdevice 58. 8.100 / 58. 8.100
libavfilter 7. 57.100 / 7. 57.100
libswscale 5. 5.100 / 5. 5.100
libswresample 3. 5.100 / 3. 5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/movies/original.mov':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
creation_time : 2020-04-03T03:04:59.000000Z
com.apple.quicktime.make: Apple
com.apple.quicktime.model: MacBookPro14,2
com.apple.quicktime.software: Mac OS X 10.15.3 (19D76)
com.apple.quicktime.creationdate: 2020-04-03T12:04:59+0900
Duration: 00:00:06.02, start: 0.000000, bitrate: 3428 kb/s
Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 2052x728 [SAR 1:1 DAR 513:182], 3370 kb/s, 60 fps, 60 tbr, 6k tbn, 12k tbc (default)
Metadata:
creation_time : 2020-04-03T03:04:59.000000Z
handler_name : Core Media Video
encoder : H.264
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[swscaler @ 0x55b5fa028580] deprecated pixel format used, make sure you did set range correctly
Output #0, image2, to '/tmp/%05d.jpg':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
com.apple.quicktime.creationdate: 2020-04-03T12:04:59+0900
com.apple.quicktime.make: Apple
com.apple.quicktime.model: MacBookPro14,2
com.apple.quicktime.software: Mac OS X 10.15.3 (19D76)
encoder : Lavf58.29.100
Stream #0:0(und): Video: mjpeg, yuvj420p(pc), 2052x728 [SAR 1:1 DAR 513:182], q=2-31, 200 kb/s, 60 fps, 60 tbn, 60 tbc (default)
Metadata:
creation_time : 2020-04-03T03:04:59.000000Z
handler_name : Core Media Video
encoder : Lavc58.54.100 mjpeg
Side data:
cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
frame= 361 fps=124 q=24.8 Lsize=N/A time=00:00:06.01 bitrate=N/A speed=2.06x
video:9433kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
------
re-encode them to a mp4 file using libopenh264:
ffmpeg version n4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 8 (Debian 8.3.0-6)
configuration: --enable-libopenh264 --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx
libavutil 56. 31.100 / 56. 31.100
libavcodec 58. 54.100 / 58. 54.100
libavformat 58. 29.100 / 58. 29.100
libavdevice 58. 8.100 / 58. 8.100
libavfilter 7. 57.100 / 7. 57.100
libswscale 5. 5.100 / 5. 5.100
libswresample 3. 5.100 / 3. 5.100
Input #0, image2, from '/tmp/%05d.jpg':
Duration: 00:00:14.44, start: 0.000000, bitrate: N/A
Stream #0:0: Video: mjpeg (Baseline), yuvj420p(pc, bt470bg/unknown/unknown), 2052x728 [SAR 1:1 DAR 513:182], 25 fps, 25 tbr, 25 tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libopenh264))
Press [q] to stop, [?] for help
[swscaler @ 0x557701db5b40] deprecated pixel format used, make sure you did set range correctly
[libopenh264 @ 0x557701a6f400] [OpenH264] this = 0x0x557701a750d0, Warning:bEnableFrameSkip = 0,bitrate can't be controlled for RC_QUALITY_MODE,RC_BITRATE_MODE and RC_TIMESTAMP_MODE without enabling skip frame.
[libopenh264 @ 0x557701a6f400] [OpenH264] this = 0x0x557701a750d0, Warning:Change QP Range from(0,51) to (12,42)
Output #0, mp4, to '/movies/re-encoded.mp4':
Metadata:
encoder : Lavf58.29.100
Stream #0:0: Video: h264 (libopenh264) (avc1 / 0x31637661), yuv420p, 2052x728 [SAR 1:1 DAR 513:182], q=2-31, 200 kb/s, 60 fps, 15360 tbn, 60 tbc
Metadata:
encoder : Lavc58.54.100 libopenh264
Side data:
cpb: bitrate max/min/avg: 200000/0/200000 buffer size: 0 vbv_delay: -1
frame= 362 fps=103 q=-0.0 Lsize= 1002kB time=00:00:06.01 bitrate=1363.8kbits/s dup=1 drop=0 speed=1.71x
video:999kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.233953%
re-encoded file info:
{'format': {'bit_rate': '1359863',
'duration': '6.034000',
'filename': '/movies/re-encoded.mp4',
'format_long_name': 'QuickTime / MOV',
'format_name': 'mov,mp4,m4a,3gp,3g2,mj2',
'nb_programs': 0,
'nb_streams': 1,
'probe_score': 100,
'size': '1025677',
'start_time': '0.000000',
'tags': {'compatible_brands': 'isomiso2avc1mp41',
'encoder': 'Lavf58.29.100',
'major_brand': 'isom',
'minor_version': '512'}},
'streams': [{'avg_frame_rate': '60/1',
'bit_rate': '1356839',
'bits_per_raw_sample': '8',
'chroma_location': 'left',
'codec_long_name': 'H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10',
'codec_name': 'h264',
'codec_tag': '0x31637661',
'codec_tag_string': 'avc1',
'codec_time_base': '1/120',
'codec_type': 'video',
'coded_height': 736,
'coded_width': 2064,
'display_aspect_ratio': '513:182',
'disposition': {'attached_pic': 0,
'clean_effects': 0,
'comment': 0,
'default': 1,
'dub': 0,
'forced': 0,
'hearing_impaired': 0,
'karaoke': 0,
'lyrics': 0,
'original': 0,
'timed_thumbnails': 0,
'visual_impaired': 0},
'duration': '6.033333',
'duration_ts': 92672,
'has_b_frames': 0,
'height': 728,
'index': 0,
'is_avc': 'true',
'level': 42,
'nal_length_size': '4',
'nb_frames': '362',
'pix_fmt': 'yuv420p',
'profile': 'Constrained Baseline',
'r_frame_rate': '60/1',
'refs': 1,
'sample_aspect_ratio': '1:1',
'start_pts': 0,
'start_time': '0.000000',
'tags': {'handler_name': 'VideoHandler', 'language': 'und'},
'time_base': '1/15360',
'width': 2052}]}install_ffmpeg_supporting_openh264.sh is originally copied from contribu/install_ffmpeg_supporting_openh264.sh | Github Gist and modified versions of openh264 & ffmpeg.