#2136: libvpx -crf option is broken
-------------------------------------+-------------------------------------
Reporter: evilsoup | Type: defect
Status: new | Priority: normal
Component: FFmpeg | Version: git-
Keywords: | master
libvpx,vp8,webm,crf | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
If I use a -crf of 1-3, libvpx outputs a broken file. If I use a -crf of
0, or of 4+ the files work, but they are terrible quality with irritating
artefacts (I haven't tested the entire range, but 0, 4, 5, 23 and 56 all
produce working, albeit horrible files).
Using `-crf 0`:
{{{
evilsoup@enchantment:~/Videos$ ffmpeg -i wonderlove.mov -map 0:v -c:v
libvpx -t 30 -crf 0 test0.webm
ffmpeg version git-2012-12-18-b7e085a Copyright (c) 2000-2012 the FFmpeg
developers
built on Dec 20 2012 11:44:19 with gcc 4.6 (Ubuntu/Linaro
4.6.3-1ubuntu5)
configuration: --enable-gpl --enable-libfaac --enable-libfdk-aac
--enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb
--enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx
--enable-x11grab --enable-libx264 --enable-nonfree --enable-version3
--enable-libass
libavutil 52. 12.100 / 52. 12.100
libavcodec 54. 80.100 / 54. 80.100
libavformat 54. 49.102 / 54. 49.102
libavdevice 54. 3.102 / 54. 3.102
libavfilter 3. 28.100 / 3. 28.100
libswscale 2. 1.103 / 2. 1.103
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'wonderlove.mov':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
creation_time : 2012-03-06 21:55:06
Duration: 00:04:00.08, start: 0.000000, bitrate: 30340 kb/s
Stream #0:0(eng): Video: dvvideo (dvcp / 0x70637664), yuv420p, 720x576
[SAR 16:15 DAR 4:3], 28800 kb/s, SAR 59:54 DAR 295:216, 25 fps, 25 tbr, 25
tbn, 25 tbc
Metadata:
creation_time : 2012-03-06 21:55:06
handler_name : Apple Alias Data Handler
timecode : 01:00:00:00
Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz,
stereo, s16, 1536 kb/s
Metadata:
creation_time : 2012-03-06 21:55:06
handler_name : Apple Alias Data Handler
Stream #0:2(eng): Data: none (tmcd / 0x64636D74)
Metadata:
creation_time : 2012-03-06 21:55:36
handler_name : Apple Alias Data Handler
timecode : 01:00:00:00
File 'test0.webm' already exists. Overwrite ? [y/N] y
v1.1.0
Output #0, webm, to 'test0.webm':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
encoder : Lavf54.49.102
Stream #0:0(eng): Video: vp8, yuv420p, 720x576 [SAR 59:54 DAR
295:216], q=-1--1, 200 kb/s, 1k tbn, 25 tbc
Metadata:
creation_time : 2012-03-06 21:55:06
handler_name : Apple Alias Data Handler
timecode : 01:00:00:00
Stream mapping:
Stream #0:0 -> #0:0 (dvvideo -> libvpx)
Press [q] to stop, [?] for help
frame= 750 fps=4.7 q=0.0 Lsize= 965kB time=00:00:30.00 bitrate=
263.4kbits/s
video:959kB audio:0kB subtitle:0 global headers:0kB muxing overhead
0.631034%
}}}
Using `-crf 1` (2 and 3 give almost identical output):
{{{
evilsoup@enchantment:~/Videos$ ffmpeg -i wonderlove.mov -map 0:v -c:v
libvpx -t 30 -crf 1 test1.webm
ffmpeg version git-2012-12-18-b7e085a Copyright (c) 2000-2012 the FFmpeg
developers
built on Dec 20 2012 11:44:19 with gcc 4.6 (Ubuntu/Linaro
4.6.3-1ubuntu5)
configuration: --enable-gpl --enable-libfaac --enable-libfdk-aac
--enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb
--enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx
--enable-x11grab --enable-libx264 --enable-nonfree --enable-version3
--enable-libass
libavutil 52. 12.100 / 52. 12.100
libavcodec 54. 80.100 / 54. 80.100
libavformat 54. 49.102 / 54. 49.102
libavdevice 54. 3.102 / 54. 3.102
libavfilter 3. 28.100 / 3. 28.100
libswscale 2. 1.103 / 2. 1.103
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'wonderlove.mov':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
creation_time : 2012-03-06 21:55:06
Duration: 00:04:00.08, start: 0.000000, bitrate: 30340 kb/s
Stream #0:0(eng): Video: dvvideo (dvcp / 0x70637664), yuv420p, 720x576
[SAR 16:15 DAR 4:3], 28800 kb/s, SAR 59:54 DAR 295:216, 25 fps, 25 tbr, 25
tbn, 25 tbc
Metadata:
creation_time : 2012-03-06 21:55:06
handler_name : Apple Alias Data Handler
timecode : 01:00:00:00
Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz,
stereo, s16, 1536 kb/s
Metadata:
creation_time : 2012-03-06 21:55:06
handler_name : Apple Alias Data Handler
Stream #0:2(eng): Data: none (tmcd / 0x64636D74)
Metadata:
creation_time : 2012-03-06 21:55:36
handler_name : Apple Alias Data Handler
timecode : 01:00:00:00
[libvpx @ 0xa03f2e0] v1.1.0
Output #0, webm, to 'test1.webm':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
encoder : Lavf54.49.102
Stream #0:0(eng): Video: vp8, yuv420p, 720x576 [SAR 59:54 DAR
295:216], q=-1--1, 200 kb/s, 1k tbn, 25 tbc
Metadata:
creation_time : 2012-03-06 21:55:06
handler_name : Apple Alias Data Handler
timecode : 01:00:00:00
Stream mapping:
Stream #0:0 -> #0:0 (dvvideo -> libvpx)
Press [q] to stop, [?] for help
[libvpx @ 0xa03f2e0] Error encoding frame: Invalid parameter
[libvpx @ 0xa03f2e0] Additional information: cq_level out of range
[cfg->rc_min_quantizer..cfg->rc_max_quantizer]
Video encoding failed
}}}
I apologise if I've simply misunderstood how to use libvpx, but
documentation is pretty sparse.
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2136>
FFmpeg <http://ffmpeg.org>
FFmpeg issue tracker
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