[FFmpeg-trac] #3999(ffmpeg:new): Stretching (increasing duration) of video without reencoding
FFmpeg
trac at avcodec.org
Fri Oct 3 10:52:44 CEST 2014
#3999: Stretching (increasing duration) of video without reencoding
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Reporter: Ilya87 | Owner:
Type: defect | Status: new
Priority: normal | Component: ffmpeg
Version: 2.4.1 | Resolution:
Keywords: Stretching | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Comment (by Ilya87):
https://yadi.sk/i/b2o6CYnmbny9q - original file
ffmpeg -i 122.mkv
ffmpeg version N-66581-g105654e Copyright (c) 2000-2014 the FFmpeg
developers
built on Oct 3 2014 12:40:48 with clang version 3.5.0
(branches/release_35) (llvm/branches/release_35 218565)
configuration: --prefix=/usr --enable-libvpx --cc=clang --cxx=clang++
--enable-libopus --enable-vdpau --enable-libx265 --enable-vaapi --disable-
indev=jack --disable-outdev=oss --disable-indev=oss --enable-libopenjpeg
--enable-gpl --enable-version3 --enable-libxvid --enable-nonfree --enable-
libmp3lame --enable-libfaac --enable-libx264 --enable-libtheora --enable-
postproc --enable-libvorbis --enable-shared --enable-gray --disable-static
--enable-pthreads --enable-libass --enable-libfreetype --enable-x11grab
--extra-cflags='-march=native -O3 -mfpmath=sse -pipe -fstack-protector
--param=ssp-buffer-size=4' --disable-debug
libavutil 54. 9.100 / 54. 9.100
libavcodec 56. 2.101 / 56. 2.101
libavformat 56. 7.102 / 56. 7.102
libavdevice 56. 1.100 / 56. 1.100
libavfilter 5. 1.102 / 5. 1.102
libswscale 3. 1.100 / 3. 1.100
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 1.100 / 53. 1.100
Input #0, matroska,webm, from '122.mkv':
Metadata:
encoder : libebml v1.3.0 + libmatroska v1.4.1
creation_time : 2014-10-03 08:37:49
Duration: 00:00:12.10, start: 0.120000, bitrate: 4038 kb/s
Stream #0:0: Video: mpeg2video (Main), yuv420p(tv), 720x576 [SAR 64:45
DAR 16:9], max. 9800 kb/s, 50 fps, 50 tbr, 1k tbn, 50 tbc (default)
Metadata:
BPS : 4032408
BPS-eng : 4032408
DURATION : 00:00:12.100000000
DURATION-eng : 00:00:12.100000000
NUMBER_OF_FRAMES: 303
NUMBER_OF_FRAMES-eng: 303
NUMBER_OF_BYTES : 6099018
NUMBER_OF_BYTES-eng: 6099018
_STATISTICS_WRITING_APP: mkvmerge v7.2.0 ('On Every Street') 64bit
built on Sep 21 2014 04:29:13
_STATISTICS_WRITING_APP-eng: mkvmerge v7.2.0 ('On Every Street')
64bit built on Sep 21 2014 04:29:13
_STATISTICS_WRITING_DATE_UTC: 2014-10-03 08:37:49
_STATISTICS_WRITING_DATE_UTC-eng: 2014-10-03 08:37:49
_STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
_STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
Command line: ffmpeg -r 10 -i 122.mkv -c copy 123.mkv
After this ffplay shows 10 fps in terminal (50 fps in input file is also
wrong info - 25 fps is right), but decodes at 25 fps speed as original.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/3999#comment:2>
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