Opened 17 years ago
Last modified 14 years ago
#1063 new defect
H.263 3GP video aspect ratio is computed incorrectly
| Reported by: | Owned by: | reimar | |
|---|---|---|---|
| Priority: | normal | Component: | vd |
| Version: | HEAD | Severity: | normal |
| Keywords: | Cc: | ||
| Blocked By: | Blocking: | ||
| Reproduced by developer: | no | Analyzed by developer: | no |
Description
This video (see url) is 128x96 3GP with H.263. Using MPlayer svn HEAD (-r26454) on MacOS and Linux, mplayer detects aspect ratio of 1.45:1 and scales the video to 140x96.
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffh263] vfm: ffmpeg (FFmpeg H.263+ decoder)
[...]
VDec: vo config request - 128 x 96 (preferred colorspace: Planar YV12)
Could not find matching colorspace - retrying with -vf scale...
Opening video filter: [scale]
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 1.45:1 - prescaling to correct movie aspect.
[...]
VO: [macosx] 128x96 => 140x96 Packed YUY2
This is also a problem when using mencoder with "-vf scale=0:0"
It looks like the sample_aspect_ratio is hardcoded to 12:11 in libavcodec/h263.c in h263_decode_picture_header()
report it to http://roundup.mplayerhq.hu because its one of them libavcodec bugs :)