Opened 13 years ago
Closed 13 years ago
#432 closed defect (fixed)
-vcodec copy on webm produces incorrect frame rate
| Reported by: | gervin23 | Owned by: | |
|---|---|---|---|
| Priority: | normal | Component: | avcodec |
| Version: | git | Keywords: | |
| Cc: | Blocked By: | ||
| Blocking: | Reproduced by developer: | yes | |
| Analyzed by developer: | no |
Description
using the attached blank.jpg as a starting point to loop and produce a valid webm file with a frame rate of 15, the resulting copy command will produce a file with an incorrect codec frame rate of 1000.
ffmpeg -v 9 -loglevel 99 -y -loop 1 -vframes 225 -r 15 -i blank.jpg -f webm -vcodec libvpx blank.webm
ffmpeg -v 9 -loglevel 99 -y -i blank.webm -vcodec copy -f webm blank_copy.webm
ffmpeg -v 9 -loglevel 99 -i blank_copy.webm
ffmpeg version N-32325-g6f8b1fc, Copyright (c) 2000-2011 the FFmpeg developers
built on Sep 5 2011 11:04:19 with gcc 4.5.2
configuration: --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-nonfree --enable-postproc --enable-version3 --enable-x11grab --enable-libvpx --prefix=/tmp
libavutil 51. 16. 0 / 51. 16. 0
libavcodec 53. 13. 0 / 53. 13. 0
libavformat 53. 11. 0 / 53. 11. 0
libavdevice 53. 3. 0 / 53. 3. 0
libavfilter 2. 37. 0 / 2. 37. 0
libswscale 2. 1. 0 / 2. 1. 0
libpostproc 51. 2. 0 / 51. 2. 0
[matroska,webm @ 0x8ecaac0] Format matroska,webm probed with size=2048 and score=100
st:0 removing common factor 1000000 from timebase
[vp8 @ 0x8eccd60] Unsupported bit depth: 0
[matroska,webm @ 0x8ecaac0] All info found
[matroska,webm @ 0x8ecaac0] Estimating duration from bitrate, this may be inaccurate
Seems stream 0 codec frame rate differs from container frame rate: 1000.00 (1000/1) -> 15.00 (15/1)
Input #0, matroska,webm, from 'blank_copy.webm':
Duration: 00:00:14.99, start: 0.000000, bitrate: N/A
Stream #0.0, 41, 1/1000: Video: vp8, yuv420p, 640x360, 1/1000, SAR 1:1 DAR 16:9, 1k fps, 15 tbr, 1k tbn, 1k tbc (default)
At least one output file must be specified
Attachments (1)
Change History (5)
by , 13 years ago
comment:2 by , 13 years ago
| Status: | new → open |
|---|
Could you find the revision that introduced your problem with git bisect?
comment:3 by , 13 years ago
git bisect reveals:
[981f6fc988dc33e81566fdaf4087da3cfa3ddb04] ffmpeg: better timebase guessing for stream copy
comment:4 by , 13 years ago
| Reproduced by developer: | set |
|---|---|
| Resolution: | → fixed |
| Status: | open → closed |
a blank jpg used to create the base webm file used in the description