[FFmpeg-trac] #3903(ffmpeg:new): Cutting video file with invalid start time does not warn and produces invalid file
FFmpeg
trac at avcodec.org
Wed Aug 27 22:23:26 CEST 2014
#3903: Cutting video file with invalid start time does not warn and produces
invalid file
--------------------------------------+----------------------------------
Reporter: ahthovaikied | Owner:
Type: enhancement | Status: new
Priority: normal | Component: ffmpeg
Version: git-master | Resolution:
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
--------------------------------------+----------------------------------
Comment (by ahthovaikied):
{{{
$ curl -s
http://www.auby.no/files/video_tests/h264_720p_hp_3.1_600kbps_aac_mp3_dual_audio_harry_potter.mkv
> ref.mkv
$ ffmpeg -i ref.mkv -ss 10:00:00 -t 00:00:10 -map 0 -c:v copy -c:a copy -f
matroska out.mkv
ffmpeg version N-65928-g7997d78 Copyright (c) 2000-2014 the FFmpeg
developers
built on Aug 27 2014 20:45:49 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
configuration: --enable-gpl --enable-version3 --enable-nonfree
--disable-runtime-cpudetect --disable-ffserver --disable-ffplay --disable-
encoders --disable-decoders --disable-filters --disable-debug --cpu=corei7
libavutil 54. 7.100 / 54. 7.100
libavcodec 56. 0.101 / 56. 0.101
libavformat 56. 3.100 / 56. 3.100
libavdevice 56. 0.100 / 56. 0.100
libavfilter 5. 0.103 / 5. 0.103
libswscale 3. 0.100 / 3. 0.100
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 0.100 / 53. 0.100
[matroska,webm @ 0xe7fca0] Could not find codec parameters for stream 2
(Audio: mp3, 48000 Hz, 2 channels, 160 kb/s): unspecified frame size
Consider increasing the value for the 'analyzeduration' and 'probesize'
options
Guessed Channel Layout for Input Stream #0.1 : stereo
Guessed Channel Layout for Input Stream #0.2 : stereo
Input #0, matroska,webm, from 'ref.mkv':
Metadata:
title : Harry Potter 4[Eng-Hindi]Dual.Audio BRRIP
720p-=[champ_is_here]=-
encoder : libebml v1.0.0 + libmatroska v1.0.0
creation_time : 2011-01-07 07:42:53
Duration: 00:00:57.61, start: 0.000000, bitrate: 613 kb/s
Stream #0:0(eng): Video: h264 (High), yuv420p, 1280x528 [SAR 1:1 DAR
80:33], 25 fps, 25 tbr, 1k tbn, 47.95 tbc
Metadata:
title : -=[champ_is_here]=-
Stream #0:1(eng): Audio: aac, 48000 Hz, 2 channels
Metadata:
title : -=[champ_is_here]=-
Stream #0:2(hin): Audio: mp3, 48000 Hz, 2 channels, 160 kb/s
Metadata:
title : -=[champ_is_here]=-
Output #0, matroska, to 'out.mkv':
Metadata:
title : Harry Potter 4[Eng-Hindi]Dual.Audio BRRIP
720p-=[champ_is_here]=-
encoder : Lavf56.3.100
Stream #0:0(eng): Video: h264 (H264 / 0x34363248), yuv420p, 1280x528
[SAR 1:1 DAR 80:33], q=2-31, 25 fps, 1k tbn, 1k tbc
Metadata:
title : -=[champ_is_here]=-
Stream #0:1(eng): Audio: aac ([255][0][0][0] / 0x00FF), 48000 Hz,
stereo
Metadata:
title : -=[champ_is_here]=-
Stream #0:2(hin): Audio: mp3 (U[0][0][0] / 0x0055), 48000 Hz, stereo,
160 kb/s
Metadata:
title : -=[champ_is_here]=-
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
Stream #0:2 -> #0:2 (copy)
Press [q] to stop, [?] for help
frame= 0 fps=0.0 q=-1.0 Lsize= 1kB time=00:00:00.00 bitrate=N/A
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: unknown
}}}
Just for information, FFprobe output:
{{{
$ ffprobe out.mkv
ffprobe version n2.3.3 Copyright (c) 2007-2014 the FFmpeg developers
built on Aug 19 2014 21:00:06 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
configuration: --enable-gpl --enable-version3 --enable-nonfree
--disable-runtime-cpudetect --disable-ffserver --disable-encoder=vorbis
--disable-encoder=aac --enable-x11grab --enable-libfdk-aac --enable-
libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-
libopus --enable-librtmp --enable-libtheora --enable-libvorbis --enable-
libvpx --enable-libx264 --enable-libxvid --disable-debug --extra-libs=-ldl
--cpu=corei7
libavutil 52. 92.100 / 52. 92.100
libavcodec 55. 69.100 / 55. 69.100
libavformat 55. 48.100 / 55. 48.100
libavdevice 55. 13.102 / 55. 13.102
libavfilter 4. 11.100 / 4. 11.100
libswscale 2. 6.100 / 2. 6.100
libswresample 0. 19.100 / 0. 19.100
libpostproc 52. 3.100 / 52. 3.100
[matroska,webm @ 0x18e5080] Unknown entry 0x81
[matroska,webm @ 0x18e5080] Read error at pos. 175 (0xaf)
[matroska,webm @ 0x18e5080] Unknown entry 0x82
Last message repeated 1 times
Truncating packet of size 16777216 to 880
out.mkv: End of file
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/3903#comment:2>
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