#7553: start_time / start_pts is wrong for AAC in MOV -------------------------------------+------------------------------------- Reporter: shekh | Type: defect Status: new | Priority: normal Component: | Version: undetermined | unspecified Keywords: AAC | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+------------------------------------- (maybe in other containers too)
AVStream.start_time is set to 0 but the first packet pts is -1024 If would be helpful if start_time was either correct (-1024) or undefined. The value 0 is confusing. How to reproduce: {{{ ffmpeg.exe -i src1.avi -vcodec copy -acodec aac -b:a 128k test.mov ffmpeg version N-92462-g529debc987 Copyright (c) 2000-2018 the FFmpeg developers built with gcc 8.2.1 (GCC) 20181017 configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable- fontconfig --enable-gnutls --enable-iconv --enable-libass --enable- libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore- amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable- libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable- ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth libavutil 56. 23.101 / 56. 23.101 libavcodec 58. 39.100 / 58. 39.100 libavformat 58. 22.100 / 58. 22.100 libavdevice 58. 6.100 / 58. 6.100 libavfilter 7. 44.100 / 7. 44.100 libswscale 5. 4.100 / 5. 4.100 libswresample 3. 4.100 / 3. 4.100 libpostproc 55. 4.100 / 55. 4.100 Guessed Channel Layout for Input Stream #0.1 : stereo Input #0, avi, from 'src1.avi': Duration: 00:00:05.01, start: 0.000000, bitrate: 3383 kb/s Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), yuv422p10le, 124x70, 1837 kb/s, 23.98 fps, 23.98 tbr, 23.98 tbn, 23.98 tbc Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s16, 1536 kb/s File 'test.mov' already exists. Overwrite ? [y/N] Stream mapping: Stream #0:0 -> #0:0 (copy) Stream #0:1 -> #0:1 (pcm_s16le (native) -> aac (native)) Press [q] to stop, [?] for help Output #0, mov, to 'test.mov': Metadata: encoder : Lavf58.22.100 Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), yuv422p10le, 124x70, q=2-31, 1837 kb/s, 23.98 fps, 23.98 tbr, 11988 tbn, 23.98 tbc Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s Metadata: encoder : Lavc58.39.100 aac frame= 120 fps=0.0 q=-1.0 Lsize= 1196kB time=00:00:05.01 bitrate=1954.5kbits/s speed=37.7x video:1113kB audio:79kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.336603% [aac @ 000000000050b980] Qavg: 178.232 }}} {{{ ffprobe.exe test.mov -select_streams a:0 -show_packets -show_streams >test.txt ffprobe version N-92462-g529debc987 Copyright (c) 2007-2018 the FFmpeg developers built with gcc 8.2.1 (GCC) 20181017 configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable- fontconfig --enable-gnutls --enable-iconv --enable-libass --enable- libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore- amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable- libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable- ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth libavutil 56. 23.101 / 56. 23.101 libavcodec 58. 39.100 / 58. 39.100 libavformat 58. 22.100 / 58. 22.100 libavdevice 58. 6.100 / 58. 6.100 libavfilter 7. 44.100 / 7. 44.100 libswscale 5. 4.100 / 5. 4.100 libswresample 3. 4.100 / 3. 4.100 libpostproc 55. 4.100 / 55. 4.100 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mov': Metadata: major_brand : qt minor_version : 512 compatible_brands: qt encoder : Lavf58.22.100 Duration: 00:00:05.03, start: 0.000000, bitrate: 1949 kb/s Stream #0:0(eng): Video: ffv1 (FFV1 / 0x31564646), yuv422p10le, 124x70, 1822 kb/s, 23.98 fps, 23.98 tbr, 11988 tbn, 11988 tbc (default) Metadata: handler_name : VideoHandler Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default) Metadata: handler_name : SoundHandler }}} -- Ticket URL: <https://trac.ffmpeg.org/ticket/7553> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker _______________________________________________ FFmpeg-trac mailing list FFmpeg-trac@avcodec.org http://ffmpeg.org/mailman/listinfo/ffmpeg-trac