[FFmpeg-trac] #1523(undetermined:new): automatic set a default -slices value for ffv1 version 3
FFmpeg
trac at avcodec.org
Sat Jul 14 13:43:24 CEST 2012
#1523: automatic set a default -slices value for ffv1 version 3
-------------------------------------+-------------------------------------
Reporter: dericed | Owner:
Type: enhancement | Status: new
Priority: normal | Component:
Version: git-master | undetermined
Keywords: | Resolution:
ffv1,threads | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Comment (by dericed):
It worked.
Here's with no -slices expressed.
{{{
ffmpeg started on 2012-07-14 at 07:26:01
Report written to "ffmpeg-20120714-072601.log"
Command line:
ffmpeg -report -f lavfi -t 1 -i testsrc -c:v ffv1 -g 1 -level 3 -strict
experimental -y out.mov
ffmpeg version 0.11.1.git Copyright (c) 2000-2012 the FFmpeg developers
built on Jul 13 2012 22:09:29 with gcc 4.2.1 (Apple Inc. build 5666)
(dot 3)
configuration: --prefix=/usr/local/Cellar/ffmpeg/HEAD --enable-shared
--enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables
--enable-libfreetype --cc=/usr/bin/gcc-4.2 --enable-libx264 --enable-
libfaac --enable-libmp3lame --enable-librtmp --enable-libtheora --enable-
libvorbis --enable-libvpx --enable-libxvid --enable-libopencore-amrnb
--enable-libopencore-amrwb --enable-libass --enable-libvo-aacenc --enable-
libopenjpeg
libavutil 51. 64.100 / 51. 64.100
libavcodec 54. 37.100 / 54. 37.100
libavformat 54. 16.104 / 54. 16.104
libavdevice 54. 1.100 / 54. 1.100
libavfilter 3. 2.100 / 3. 2.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 15.100 / 0. 15.100
libpostproc 52. 0.100 / 52. 0.100
[Parsed_testsrc_0 @ 0x7fdf5bc18560] size:320x240 rate:25/1
duration:-1.000000 sar:1/1
[lavfi @ 0x7fdf5c04e200] All info found
[lavfi @ 0x7fdf5c04e200] Estimating duration from bitrate, this may be
inaccurate
Input #0, lavfi, from 'testsrc':
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0:0, 1, 1/25: Video: rawvideo (RGB[24] / 0x18424752), rgb24,
320x240 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
-t is not an input option, keeping it for the next output; consider fixing
your command line.
[buffer @ 0x7fdf5bc19c40] Setting entry with key 'video_size' to value
'320x240'
[buffer @ 0x7fdf5bc19c40] Setting entry with key 'pix_fmt' to value '2'
[buffer @ 0x7fdf5bc19c40] Setting entry with key 'time_base' to value
'1/25'
[buffer @ 0x7fdf5bc19c40] Setting entry with key 'pixel_aspect' to value
'1/1'
[buffer @ 0x7fdf5bc19c40] Setting entry with key 'sws_param' to value
'flags=2'
[buffer @ 0x7fdf5bc19c40] Setting entry with key 'frame_rate' to value
'25/1'
[graph 0 input from stream 0:0 @ 0x7fdf5bc19d00] w:320 h:240 pixfmt:rgb24
tb:1/25 fr:25/1 sar:1/1 sws_param:flags=2
[format @ 0x7fdf5bc1a3a0] auto-inserting filter 'auto-inserted scaler 0'
between the filter 'Parsed_null_0' and the filter 'format'
[auto-inserted scaler 0 @ 0x7fdf5bc1a720] w:320 h:240 fmt:rgb24 sar:1/1 ->
w:320 h:240 fmt:bgr0 sar:1/1 flags:0x4
[ffv1 @ 0x7fdf5c054400] detected 2 logical cores
[mov @ 0x7fdf5c055000] Using MS style video codec tag, the file may be
unplayable!
Output #0, mov, to 'out.mov':
Metadata:
encoder : Lavf54.16.104
Stream #0:0, 0, 1/25: Video: ffv1, bgr0, 320x240 [SAR 1:1 DAR 4:3],
q=2-31, 200 kb/s, 25 tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (rawvideo -> ffv1)
Press [q] to stop, [?] for help
No more output streams to write to, finishing.
frame= 25 fps=0.0 q=0.0 Lsize= 117kB time=00:00:01.00 bitrate=
956.6kbits/s
video:116kB audio:0kB subtitle:0 global headers:0kB muxing overhead
0.693918%
}}}
and here's with a non-default slices expressed:
{{{
ffmpeg started on 2012-07-14 at 07:31:39
Report written to "ffmpeg-20120714-073139.log"
Command line:
ffmpeg -report -f lavfi -t 1 -i testsrc -c:v ffv1 -g 1 -level 3 -strict
experimental -slices 12 -y out_12.mov
ffmpeg version 0.11.1.git Copyright (c) 2000-2012 the FFmpeg developers
built on Jul 13 2012 22:09:29 with gcc 4.2.1 (Apple Inc. build 5666)
(dot 3)
configuration: --prefix=/usr/local/Cellar/ffmpeg/HEAD --enable-shared
--enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables
--enable-libfreetype --cc=/usr/bin/gcc-4.2 --enable-libx264 --enable-
libfaac --enable-libmp3lame --enable-librtmp --enable-libtheora --enable-
libvorbis --enable-libvpx --enable-libxvid --enable-libopencore-amrnb
--enable-libopencore-amrwb --enable-libass --enable-libvo-aacenc --enable-
libopenjpeg
libavutil 51. 64.100 / 51. 64.100
libavcodec 54. 37.100 / 54. 37.100
libavformat 54. 16.104 / 54. 16.104
libavdevice 54. 1.100 / 54. 1.100
libavfilter 3. 2.100 / 3. 2.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 15.100 / 0. 15.100
libpostproc 52. 0.100 / 52. 0.100
[Parsed_testsrc_0 @ 0x7f99e8c185a0] size:320x240 rate:25/1
duration:-1.000000 sar:1/1
[lavfi @ 0x7f99e904e200] All info found
[lavfi @ 0x7f99e904e200] Estimating duration from bitrate, this may be
inaccurate
Input #0, lavfi, from 'testsrc':
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0:0, 1, 1/25: Video: rawvideo (RGB[24] / 0x18424752), rgb24,
320x240 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
-t is not an input option, keeping it for the next output; consider fixing
your command line.
[buffer @ 0x7f99e8c19d60] Setting entry with key 'video_size' to value
'320x240'
[buffer @ 0x7f99e8c19d60] Setting entry with key 'pix_fmt' to value '2'
[buffer @ 0x7f99e8c19d60] Setting entry with key 'time_base' to value
'1/25'
[buffer @ 0x7f99e8c19d60] Setting entry with key 'pixel_aspect' to value
'1/1'
[buffer @ 0x7f99e8c19d60] Setting entry with key 'sws_param' to value
'flags=2'
[buffer @ 0x7f99e8c19d60] Setting entry with key 'frame_rate' to value
'25/1'
[graph 0 input from stream 0:0 @ 0x7f99e8c19e00] w:320 h:240 pixfmt:rgb24
tb:1/25 fr:25/1 sar:1/1 sws_param:flags=2
[format @ 0x7f99e8c1a460] auto-inserting filter 'auto-inserted scaler 0'
between the filter 'Parsed_null_0' and the filter 'format'
[auto-inserted scaler 0 @ 0x7f99e8c1a7e0] w:320 h:240 fmt:rgb24 sar:1/1 ->
w:320 h:240 fmt:bgr0 sar:1/1 flags:0x4
[ffv1 @ 0x7f99e9054400] detected 2 logical cores
[mov @ 0x7f99e9055000] Using MS style video codec tag, the file may be
unplayable!
Output #0, mov, to 'out_12.mov':
Metadata:
encoder : Lavf54.16.104
Stream #0:0, 0, 1/25: Video: ffv1, bgr0, 320x240 [SAR 1:1 DAR 4:3],
q=2-31, 200 kb/s, 25 tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (rawvideo -> ffv1)
Press [q] to stop, [?] for help
No more output streams to write to, finishing.
frame= 25 fps=0.0 q=0.0 Lsize= 127kB time=00:00:01.00
bitrate=1041.0kbits/s
video:126kB audio:0kB subtitle:0 global headers:0kB muxing overhead
0.637253%
}}}
However neither ffmpeg during encoding, nor ffprobe, could report on the
slice count used. In order to verify the slice count of the encoding I
used zzuf to corrupt the file and looked for the slices patterns during
playback. I'll add another ticket to report on slices and version of ffv1
in ffprobe.
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1523#comment:3>
FFmpeg <http://ffmpeg.org>
FFmpeg issue tracker
More information about the FFmpeg-trac
mailing list