[FFmpeg-user] yuv422p16le silently converted to yuv422p10le - even if pix_fmt is set to 16bit
Peter B.
pb at das-werkstatt.com
Thu Oct 4 12:54:12 CEST 2012
I just came across another oddity with the VQEG YUV10 material and ffmpeg:
If encoded to FFv1.1, once with and once without a target pix_fmt
specified, both files have the exact identical properties (according
to ffprobe), but differ in filesize.
without pix_fmt: 143.863.496 Bytes
with pix_fmt given: 144.422.286 Bytes
Then I did framemd5 comparisons and found out that their checksums
don't match.
//-------------------------
$ffmpeg -s 720x576 -r 25 -i
client/VQEG/HDTV/SVT_exports/SVT_YUV10_Exports_/NewMobCal_YUV10_576i25_/%05d.yuv10 -an -vcodec ffv1
client/output/yuv10/NewMobCal_576i25-ffv1_without_pixfmt.avi
ffmpeg version N-44894-g5f1c3c7 Copyright (c) 2000-2012 the FFmpeg developers
built on Sep 30 2012 04:26:08 with gcc 4.4.5 (Debian 4.4.5-8)
configuration: --prefix=/usr/local --enable-gpl --enable-nonfree
--enable-version3 --enable-postproc --enable-swscale --enable-avfilter
--enable-pthreads --enable-bzlib --enable-libmp3lame
--enable-libvorbis --enable-libxvid --enable-zlib --enable-libopenjpeg
--enable-decoder=png --enable-encoder=png --enable-libfreetype
--enable-libschroedinger
libavutil 51. 73.101 / 51. 73.101
libavcodec 54. 61.100 / 54. 61.100
libavformat 54. 29.105 / 54. 29.105
libavdevice 54. 3.100 / 54. 3.100
libavfilter 3. 18.100 / 3. 18.100
libswscale 2. 1.101 / 2. 1.101
libswresample 0. 16.100 / 0. 16.100
libpostproc 52. 1.100 / 52. 1.100
Input #0, image2, from
'client/VQEG/HDTV/SVT_exports/SVT_YUV10_Exports_/NewMobCal_YUV10_576i25_/%05d.yuv10':
Duration: 00:00:10.08, start: 0.000000, bitrate: N/A
Stream #0:0: Video: v210x, yuv422p16le, 720x576, 25 fps, 25 tbr,
25 tbn, 25 tbc
[ffv1 @ 0x970fba0] bits_per_raw_sample > 8, forcing coder 1
Output #0, avi, to
'client/output/yuv10/NewMobCal_576i25-ffv1_without_pixfmt.avi':
Metadata:
ISFT : Lavf54.29.105
Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), yuv422p16le,
720x576, q=2-31, 200 kb/s, 25 tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (v210x -> ffv1)
Press [q] to stop, [?] for help
frame= 252 fps=4.8 q=0.0 Lsize= 140492kB time=00:00:10.08
bitrate=114177.4kbits/s
video:140480kB audio:0kB subtitle:0 global headers:0kB muxing overhead
0.008249%
//-------------------------
ffmpeg -s 720x576 -r 25 -i
client/VQEG/HDTV/SVT_exports/SVT_YUV10_Exports_/NewMob
Cal_YUV10_576i25_/%05d.yuv10 -an -vcodec ffv1 -pix_fmt yuv422p10le
client/output/yuv10/NewMobCal_576i25-ffv1_with_p
ixfmt.avi
ffmpeg version N-44894-g5f1c3c7 Copyright (c) 2000-2012 the FFmpeg developers
built on Sep 30 2012 04:26:08 with gcc 4.4.5 (Debian 4.4.5-8)
configuration: --prefix=/usr/local --enable-gpl --enable-nonfree
--enable-version3 --enable-postproc --enable-sws
cale --enable-avfilter --enable-pthreads --enable-bzlib
--enable-libmp3lame --enable-libvorbis --enable-libxvid --e
nable-zlib --enable-libopenjpeg --enable-decoder=png
--enable-encoder=png --enable-libfreetype --enable-libschroedi
nger
libavutil 51. 73.101 / 51. 73.101
libavcodec 54. 61.100 / 54. 61.100
libavformat 54. 29.105 / 54. 29.105
libavdevice 54. 3.100 / 54. 3.100
libavfilter 3. 18.100 / 3. 18.100
libswscale 2. 1.101 / 2. 1.101
libswresample 0. 16.100 / 0. 16.100
libpostproc 52. 1.100 / 52. 1.100
Input #0, image2, from
'client/VQEG/HDTV/SVT_exports/SVT_YUV10_Exports_/NewMobCal_YUV10_576i25_/%05d.yuv10':
Duration: 00:00:10.08, start: 0.000000, bitrate: N/A
Stream #0:0: Video: v210x, yuv422p16le, 720x576, 25 fps, 25 tbr,
25 tbn, 25 tbc
[ffv1 @ 0x937cba0] bits_per_raw_sample > 8, forcing coder 1
Output #0, avi, to
'client/output/yuv10/NewMobCal_576i25-ffv1_with_pixfmt.avi':
Metadata:
ISFT : Lavf54.29.105
Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), yuv422p10le,
720x576, q=2-31, 200 kb/s, 25 tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (v210x -> ffv1)
Press [q] to stop, [?] for help
frame= 252 fps=5.3 q=0.0 Lsize= 141037kB time=00:00:10.08
bitrate=114620.9kbits/s
video:141026kB audio:0kB subtitle:0 global headers:0kB muxing overhead
0.008212%
//-------------------------
Here's ffprobe's output of both files:
//-------------------------
ffprobe -v debug client/output/yuv10/NewMobCal_576i25-ffv1_without_pixfmt.avi
ffprobe version N-44894-g5f1c3c7 Copyright (c) 2007-2012 the FFmpeg developers
built on Sep 30 2012 04:26:08 with gcc 4.4.5 (Debian 4.4.5-8)
configuration: --prefix=/usr/local --enable-gpl --enable-nonfree
--enable-version3 --enable-postproc --enable-swscale --enable-avfilter
--enable-pthreads --enable-bzlib --enable-libmp3lame
--enable-libvorbis --enable-libxvid --enable-zlib --enable-libopenjpeg
--enable-decoder=png --enable-encoder=png --enable-libfreetype
--enable-libschroedinger
libavutil 51. 73.101 / 51. 73.101
libavcodec 54. 61.100 / 54. 61.100
libavformat 54. 29.105 / 54. 29.105
libavdevice 54. 3.100 / 54. 3.100
libavfilter 3. 18.100 / 3. 18.100
libswscale 2. 1.101 / 2. 1.101
libswresample 0. 16.100 / 0. 16.100
libpostproc 52. 1.100 / 52. 1.100
[avi @ 0x95c8e80] Format avi probed with size=2048 and score=100
[avi @ 0x95c9420] use odml:1
[avi @ 0x95c8e80] File position before avformat_find_stream_info() is 5674
[avi @ 0x95c8e80] parser not found for codec ffv1, packets or times
may be invalid.
Last message repeated 1 times
[avi @ 0x95c8e80] All info found
[avi @ 0x95c8e80] File position after avformat_find_stream_info() is 441623
Input #0, avi, from
'client/output/yuv10/NewMobCal_576i25-ffv1_without_pixfmt.avi':
Metadata:
encoder : Lavf54.29.105
Duration: 00:00:10.08, start: 0.000000, bitrate: 114177 kb/s
Stream #0:0, 1, 1/25: Video: ffv1 (FFV1 / 0x31564646),
yuv422p10le, 720x576, 1/25, 25 tbr, 25 tbn, 25 tbc
[ffv1 @ 0x95cf160] detected 4 logical cores
[AVIOContext @ 0x95d1460] Statistics: 509557 bytes read, 4 seeks
//-------------------------
ffprobe -v debug client/output/yuv10/NewMobCal_576i25-ffv1_with_pixfmt.avi
ffprobe version N-44894-g5f1c3c7 Copyright (c) 2007-2012 the FFmpeg developers
built on Sep 30 2012 04:26:08 with gcc 4.4.5 (Debian 4.4.5-8)
configuration: --prefix=/usr/local --enable-gpl --enable-nonfree
--enable-version3 --enable-postproc --enable-swscale --enable-avfilter
--enable-pthreads --enable-bzlib --enable-libmp3lame
--enable-libvorbis --enable-libxvid --enable-zlib --enable-libopenjpeg
--enable-decoder=png --enable-encoder=png --enable-libfreetype
--enable-libschroedinger
libavutil 51. 73.101 / 51. 73.101
libavcodec 54. 61.100 / 54. 61.100
libavformat 54. 29.105 / 54. 29.105
libavdevice 54. 3.100 / 54. 3.100
libavfilter 3. 18.100 / 3. 18.100
libswscale 2. 1.101 / 2. 1.101
libswresample 0. 16.100 / 0. 16.100
libpostproc 52. 1.100 / 52. 1.100
[avi @ 0xa347e80] Format avi probed with size=2048 and score=100
[avi @ 0xa348400] use odml:1
[avi @ 0xa347e80] File position before avformat_find_stream_info() is 5674
[avi @ 0xa347e80] parser not found for codec ffv1, packets or times
may be invalid.
Last message repeated 1 times
[avi @ 0xa347e80] All info found
[avi @ 0xa347e80] File position after avformat_find_stream_info() is 445734
Input #0, avi, from
'client/output/yuv10/NewMobCal_576i25-ffv1_with_pixfmt.avi':
Metadata:
encoder : Lavf54.29.105
Duration: 00:00:10.08, start: 0.000000, bitrate: 114620 kb/s
Stream #0:0, 1, 1/25: Video: ffv1 (FFV1 / 0x31564646),
yuv422p10le, 720x576, 1/25, 25 tbr, 25 tbn, 25 tbc
[ffv1 @ 0xa34e140] detected 4 logical cores
[AVIOContext @ 0xa350440] Statistics: 513668 bytes read, 4 seeks
//-------------------------
I think that this behavior is very confusing, and I thought you might
want to know.
I'll try this again by converting the source to raw yuv422p16le, as
the source input of v210x might introduce some oddities here.
Thanks,
Pb
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