Opened 11 years ago
Closed 11 years ago
#3161 closed defect (worksforme)
libvpx crf does nothing
| Reported by: | LinAGKar | Owned by: | |
|---|---|---|---|
| Priority: | normal | Component: | undetermined |
| Version: | 2.0.2 | Keywords: | libvpx |
| Cc: | Blocked By: | ||
| Blocking: | Reproduced by developer: | no | |
| Analyzed by developer: | no |
Description
When encoding with libvpx "crf" does not seem to change the quality or bitrate, for example "-crf 4" and "-crf 63" gives almost exactly the same output.
Attachments (2)
Change History (5)
comment:1 by , 11 years ago
comment:2 by , 11 years ago
crf=4:
> ffmpeg -i Big\ Buck\ Bunny.mkv -t 15 -an -vcodec libvpx -crf 4 Big\ Buck\ Bunny\ 4.webm
ffmpeg version 2.0.2 Copyright (c) 2000-2013 the FFmpeg developers
built on Oct 19 2013 08:34:03 with gcc 4.7 (SUSE Linux)
configuration: --shlibdir=/usr/lib64 --prefix=/usr --mandir=/usr/share/man --libdir=/usr/lib64 --enable-shared --disable-static --enable-debug --disable-stripping --extra-cflags='-fmessage-length=0 -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables -fasynchronous-unwind-tables -g -fPIC -I/usr/include/gsm' --enable-gpl --enable-x11grab --enable-version3 --enable-pthreads --enable-avfilter --enable-libpulse --enable-libvpx --enable-libopus --enable-libass --enable-libmp3lame --enable-libvorbis --enable-libtheora --enable-libspeex --enable-libxvid --enable-libx264 --enable-libschroedinger --enable-libgsm --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-postproc --enable-libdc1394 --enable-librtmp --enable-libfreetype --enable-avresample --enable-libtwolame --enable-libvo-aacenc
libavutil 52. 38.100 / 52. 38.100
libavcodec 55. 18.102 / 55. 18.102
libavformat 55. 12.100 / 55. 12.100
libavdevice 55. 3.100 / 55. 3.100
libavfilter 3. 79.101 / 3. 79.101
libavresample 1. 1. 0 / 1. 1. 0
libswscale 2. 3.100 / 2. 3.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 3.100 / 52. 3.100
Input #0, matroska,webm, from 'Big Buck Bunny.mkv':
Metadata:
ENCODER : Lavf55.12.100
Duration: 00:09:56.46, start: 0.000000, bitrate: 309088 kb/s
Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), bgr0, 1920x1080, SAR 1:1 DAR 16:9, 24 fps, 24 tbr, 1k tbn, 1k tbc (default)
Stream #0:1: Audio: flac, 48000 Hz, 5.1(side), s32 (default)
[libvpx @ 0x1eac7a0] v1.1.0
Output #0, webm, to 'Big Buck Bunny 4.webm':
Metadata:
encoder : Lavf55.12.100
Stream #0:0: Video: vp8 (libvpx), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 200 kb/s, 1k tbn, 24 tbc (default)
Stream mapping:
Stream #0:0 -> #0:0 (ffv1 -> libvpx)
Press [q] to stop, [?] for help
frame= 360 fps=6.7 q=0.0 Lsize= 779kB time=00:00:15.00 bitrate= 425.6kbits/s
video:776kB audio:0kB subtitle:0 global headers:0kB muxing overhead 0.394523%
crf=63:
> ffmpeg -i Big\ Buck\ Bunny.mkv -t 15 -an -vcodec libvpx -crf 63 Big\ Buck\ Bunny\ 63.webm
ffmpeg version 2.0.2 Copyright (c) 2000-2013 the FFmpeg developers
built on Oct 19 2013 08:34:03 with gcc 4.7 (SUSE Linux)
configuration: --shlibdir=/usr/lib64 --prefix=/usr --mandir=/usr/share/man --libdir=/usr/lib64 --enable-shared --disable-static --enable-debug --disable-stripping --extra-cflags='-fmessage-length=0 -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables -fasynchronous-unwind-tables -g -fPIC -I/usr/include/gsm' --enable-gpl --enable-x11grab --enable-version3 --enable-pthreads --enable-avfilter --enable-libpulse --enable-libvpx --enable-libopus --enable-libass --enable-libmp3lame --enable-libvorbis --enable-libtheora --enable-libspeex --enable-libxvid --enable-libx264 --enable-libschroedinger --enable-libgsm --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-postproc --enable-libdc1394 --enable-librtmp --enable-libfreetype --enable-avresample --enable-libtwolame --enable-libvo-aacenc
libavutil 52. 38.100 / 52. 38.100
libavcodec 55. 18.102 / 55. 18.102
libavformat 55. 12.100 / 55. 12.100
libavdevice 55. 3.100 / 55. 3.100
libavfilter 3. 79.101 / 3. 79.101
libavresample 1. 1. 0 / 1. 1. 0
libswscale 2. 3.100 / 2. 3.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 3.100 / 52. 3.100
Input #0, matroska,webm, from 'Big Buck Bunny.mkv':
Metadata:
ENCODER : Lavf55.12.100
Duration: 00:09:56.46, start: 0.000000, bitrate: 309088 kb/s
Stream #0:0: Video: ffv1 (FFV1 / 0x31564646), bgr0, 1920x1080, SAR 1:1 DAR 16:9, 24 fps, 24 tbr, 1k tbn, 1k tbc (default)
Stream #0:1: Audio: flac, 48000 Hz, 5.1(side), s32 (default)
[libvpx @ 0x16087a0] v1.1.0
Output #0, webm, to 'Big Buck Bunny 63.webm':
Metadata:
encoder : Lavf55.12.100
Stream #0:0: Video: vp8 (libvpx), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 200 kb/s, 1k tbn, 24 tbc (default)
Stream mapping:
Stream #0:0 -> #0:0 (ffv1 -> libvpx)
Press [q] to stop, [?] for help
frame= 360 fps=6.8 q=0.0 Lsize= 778kB time=00:00:15.00 bitrate= 425.0kbits/s
video:775kB audio:0kB subtitle:0 global headers:0kB muxing overhead 0.391042%
comment:3 by , 11 years ago
| Component: | FFmpeg → undetermined |
|---|---|
| Keywords: | crf removed |
| Resolution: | → worksforme |
| Status: | new → closed |
For future tickets: Please always test current FFmpeg as explained on http://ffmpeg.org/bugreports.html
$ ffmpeg -f lavfi -i testsrc -crf 4 -t 15 4.webm
ffmpeg version 2.0.2 Copyright (c) 2000-2013 the FFmpeg developers
built on Dec 9 2013 11:02:30 with gcc 4.7 (SUSE Linux)
configuration: --enable-gpl --enable-libvpx
libavutil 52. 38.100 / 52. 38.100
libavcodec 55. 18.102 / 55. 18.102
libavformat 55. 12.100 / 55. 12.100
libavdevice 55. 3.100 / 55. 3.100
libavfilter 3. 79.101 / 3. 79.101
libswscale 2. 3.100 / 2. 3.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 3.100 / 52. 3.100
Input #0, lavfi, from 'testsrc':
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 320x240 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
[libvpx @ 0x36147a0] v1.2.0
Output #0, webm, to '4.webm':
Metadata:
encoder : Lavf55.12.100
Stream #0:0: Video: vp8 (libvpx), yuv420p, 320x240 [SAR 1:1 DAR 4:3], q=-1--1, 200 kb/s, 1k tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (rawvideo -> libvpx)
Press [q] to stop, [?] for help
frame= 375 fps=0.0 q=0.0 Lsize= 261kB time=00:00:15.00 bitrate= 142.4kbits/s
video:258kB audio:0kB subtitle:0 global headers:0kB muxing overhead 1.199901%
$ ffmpeg -f lavfi -i testsrc -crf 63 -t 15 63.webm
ffmpeg version 2.0.2 Copyright (c) 2000-2013 the FFmpeg developers
built on Dec 9 2013 11:02:30 with gcc 4.7 (SUSE Linux)
configuration: --enable-gpl --enable-libvpx
libavutil 52. 38.100 / 52. 38.100
libavcodec 55. 18.102 / 55. 18.102
libavformat 55. 12.100 / 55. 12.100
libavdevice 55. 3.100 / 55. 3.100
libavfilter 3. 79.101 / 3. 79.101
libswscale 2. 3.100 / 2. 3.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 3.100 / 52. 3.100
Input #0, lavfi, from 'testsrc':
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 320x240 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
[libvpx @ 0x22f87a0] v1.2.0
Output #0, webm, to '63.webm':
Metadata:
encoder : Lavf55.12.100
Stream #0:0: Video: vp8 (libvpx), yuv420p, 320x240 [SAR 1:1 DAR 4:3], q=-1--1, 200 kb/s, 1k tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (rawvideo -> libvpx)
Press [q] to stop, [?] for help
frame= 375 fps=0.0 q=0.0 Lsize= 75kB time=00:00:15.00 bitrate= 40.9kbits/s
video:72kB audio:0kB subtitle:0 global headers:0kB muxing overhead 3.847820%
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