[FFmpeg-trac] #3947(undetermined:new): Inconsistent and confusing setting of refs with libx264
FFmpeg
trac at avcodec.org
Fri Sep 12 21:04:14 CEST 2014
#3947: Inconsistent and confusing setting of refs with libx264
-------------------------------------+-------------------------------------
Reporter: | Type: defect
francois.visagie@… | Priority: normal
Status: new | Version: git-
Component: | master
undetermined | Blocked By:
Keywords: libx264 | Reproduced by developer: 0
level refs |
Blocking: |
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Summary of the bug:
1. '-x264opts level=x.y' is documented but does not set refs correctly
2. '-level x.y' sets refs correctly but is not documented
How to reproduce:
Default behaviour:
{{{
ffmpeg -i _640.360.25.avi -preset veryslow output.default.mp4
ffmpeg version N-66232-g5e3da25 Copyright (c) 2000-2014 the FFmpeg
developers
built on Sep 10 2014 22:01:59 with gcc 4.8.3 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
--enable-gnutls --enab
le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-
libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-
libilbc --enable-lib
modplug --enable-libmp3lame --enable-libopencore-amrnb --enable-
libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp
--enable-libschroedinge
r --enable-libsoxr --enable-libspeex --enable-libtheora --enable-
libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-
amrwbenc --enable-libvorbis
--enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264
--enable-libx265 --enable-libxavs --enable-libxvid --enable-decklink
--enable-zlib
libavutil 54. 7.100 / 54. 7.100
libavcodec 56. 1.100 / 56. 1.100
libavformat 56. 4.101 / 56. 4.101
libavdevice 56. 0.100 / 56. 0.100
libavfilter 5. 1.100 / 5. 1.100
libswscale 3. 0.100 / 3. 0.100
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 0.100 / 53. 0.100
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, avi, from '_640.360.25.avi':
Duration: 00:00:10.00, start: 0.000000, bitrate: 7561 kb/s
Stream #0:0: Video: mpeg4 (Advanced Simple Profile) (XVID /
0x44495658), yuv420p, 640x360 [SAR 1:1 DAR 16:9], 6031 kb/s, 25 fps, 25
tbr, 25 tbn, 25 tbc
Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, 2
channels, s16, 1536 kb/s
[libx264 @ 0364f380] using SAR=1/1
[libx264 @ 0364f380] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
AVX
[libx264 @ 0364f380] profile High, level 3.1
[libx264 @ 0364f380] 264 - core 142 r2479 dd79a61 - H.264/MPEG-4 AVC codec
- Copyleft 2003-2014 - http://www.videolan.org/x264.html - options:
cabac=1 ref=16 de
block=1:0:0 analyse=0x3:0x133 me=umh subme=10 psy=1 psy_rd=1.00:0.00
mixed_ref=1 me_range=24 chroma_me=1 trellis=2 8x8dct=1 cqm=0
deadzone=21,11 fast_pskip=1 ch
roma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0
decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=8
b_pyramid=2 b_adapt=
2 b_bias=0 direct=3 weightb=1 open_gop=0 weightp=2 keyint=250
keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=60 rc=crf mbtree=1
crf=23.0 qcomp=0.60 qpmi
n=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'output.default.mp4':
Metadata:
encoder : Lavf56.4.101
Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p,
640x360 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc
Metadata:
encoder : Lavc56.1.100 libx264
Stream #0:1: Audio: aac (libvo_aacenc) ([64][0][0][0] / 0x0040), 48000
Hz, stereo, s16, 128 kb/s
Metadata:
encoder : Lavc56.1.100 libvo_aacenc
Stream mapping:
Stream #0:0 -> #0:0 (mpeg4 (native) -> h264 (libx264))
Stream #0:1 -> #0:1 (pcm_s16le (native) -> aac (libvo_aacenc))
Press [q] to stop, [?] for help
frame= 251 fps= 15 q=-1.0 Lsize= 1184kB time=00:00:10.01 bitrate=
968.6kbits/s dup=1 drop=0
video:1019kB audio:157kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.723548%
[libx264 @ 0364f380] frame I:2 Avg QP:25.09 size: 36162
[libx264 @ 0364f380] frame P:60 Avg QP:24.47 size: 12750
[libx264 @ 0364f380] frame B:189 Avg QP:31.31 size: 1085
[libx264 @ 0364f380] consecutive B-frames: 0.8% 6.4% 12.0% 33.5% 13.9%
33.5% 0.0% 0.0% 0.0%
[libx264 @ 0364f380] mb I I16..4: 4.0% 77.1% 18.9%
[libx264 @ 0364f380] mb P I16..4: 0.4% 1.3% 0.4% P16..4: 36.6% 20.6%
30.7% 3.7% 1.5% skip: 4.8%
[libx264 @ 0364f380] mb B I16..4: 0.0% 0.0% 0.0% B16..8: 47.7% 4.8%
1.7% direct: 1.3% skip:44.4% L0:41.8% L1:40.5% BI:17.7%
[libx264 @ 0364f380] 8x8 transform intra:70.9% inter:53.0%
[libx264 @ 0364f380] direct mvs spatial:97.4% temporal:2.6%
[libx264 @ 0364f380] coded y,uvDC,uvAC intra: 81.8% 78.8% 40.8% inter:
14.5% 11.3% 2.0%
[libx264 @ 0364f380] i16 v,h,dc,p: 41% 17% 28% 14%
[libx264 @ 0364f380] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 15% 10% 18% 8% 10%
10% 9% 9% 11%
[libx264 @ 0364f380] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 16% 6% 6% 10% 13%
13% 12% 12% 13%
[libx264 @ 0364f380] i8c dc,h,v,p: 28% 28% 31% 13%
[libx264 @ 0364f380] Weighted P-Frames: Y:18.3% UV:10.0%
[libx264 @ 0364f380] ref P L0: 58.5% 17.3% 8.4% 4.3% 1.8% 2.6% 1.3%
1.3% 0.7% 0.9% 0.5% 0.5% 0.5% 0.5% 0.4% 0.5%
[libx264 @ 0364f380] ref B L0: 91.8% 3.9% 2.0% 0.5% 0.5% 0.3% 0.2%
0.1% 0.2% 0.1% 0.1% 0.1% 0.1% 0.1% 0.0%
[libx264 @ 0364f380] ref B L1: 95.5% 4.5%
[libx264 @ 0364f380] kb/s:830.51
}}}
{{{
Expected default refs value: 16
Actual refs value: 16
}}}
Documented '-x264opts level=x.y' option:
{{{
ffmpeg -i _640.360.25.avi -preset veryslow -x264opts level=3.0 output.--
level3.0.mp4
ffmpeg version N-66232-g5e3da25 Copyright (c) 2000-2014 the FFmpeg
developers
built on Sep 10 2014 22:01:59 with gcc 4.8.3 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
--enable-gnutls --enab
le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-
libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-
libilbc --enable-lib
modplug --enable-libmp3lame --enable-libopencore-amrnb --enable-
libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp
--enable-libschroedinge
r --enable-libsoxr --enable-libspeex --enable-libtheora --enable-
libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-
amrwbenc --enable-libvorbis
--enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264
--enable-libx265 --enable-libxavs --enable-libxvid --enable-decklink
--enable-zlib
libavutil 54. 7.100 / 54. 7.100
libavcodec 56. 1.100 / 56. 1.100
libavformat 56. 4.101 / 56. 4.101
libavdevice 56. 0.100 / 56. 0.100
libavfilter 5. 1.100 / 5. 1.100
libswscale 3. 0.100 / 3. 0.100
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 0.100 / 53. 0.100
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, avi, from '_640.360.25.avi':
Duration: 00:00:10.00, start: 0.000000, bitrate: 7561 kb/s
Stream #0:0: Video: mpeg4 (Advanced Simple Profile) (XVID /
0x44495658), yuv420p, 640x360 [SAR 1:1 DAR 16:9], 6031 kb/s, 25 fps, 25
tbr, 25 tbn, 25 tbc
Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, 2
channels, s16, 1536 kb/s
[libx264 @ 0429e880] using SAR=1/1
[libx264 @ 0429e880] DPB size (16 frames, 14720 mbs) > level limit (8
frames, 8100 mbs)
[libx264 @ 0429e880] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
AVX
[libx264 @ 0429e880] profile High, level 3.0
[libx264 @ 0429e880] 264 - core 142 r2479 dd79a61 - H.264/MPEG-4 AVC codec
- Copyleft 2003-2014 - http://www.videolan.org/x264.html - options:
cabac=1 ref=16 de
block=1:0:0 analyse=0x3:0x133 me=umh subme=10 psy=1 psy_rd=1.00:0.00
mixed_ref=1 me_range=24 chroma_me=1 trellis=2 8x8dct=1 cqm=0
deadzone=21,11 fast_pskip=1 ch
roma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0
decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=8
b_pyramid=2 b_adapt=
2 b_bias=0 direct=3 weightb=1 open_gop=0 weightp=2 keyint=250
keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=60 rc=crf mbtree=1
crf=23.0 qcomp=0.60 qpmi
n=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'output.--level3.0.mp4':
Metadata:
encoder : Lavf56.4.101
Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p,
640x360 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc
Metadata:
encoder : Lavc56.1.100 libx264
Stream #0:1: Audio: aac (libvo_aacenc) ([64][0][0][0] / 0x0040), 48000
Hz, stereo, s16, 128 kb/s
Metadata:
encoder : Lavc56.1.100 libvo_aacenc
Stream mapping:
Stream #0:0 -> #0:0 (mpeg4 (native) -> h264 (libx264))
Stream #0:1 -> #0:1 (pcm_s16le (native) -> aac (libvo_aacenc))
Press [q] to stop, [?] for help
frame= 251 fps= 15 q=-1.0 Lsize= 1184kB time=00:00:10.01 bitrate=
968.7kbits/s dup=1 drop=0
video:1019kB audio:157kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.723486%
[libx264 @ 0429e880] frame I:2 Avg QP:25.09 size: 36162
[libx264 @ 0429e880] frame P:60 Avg QP:24.47 size: 12748
[libx264 @ 0429e880] frame B:189 Avg QP:31.30 size: 1085
[libx264 @ 0429e880] consecutive B-frames: 0.8% 6.4% 12.0% 33.5% 13.9%
33.5% 0.0% 0.0% 0.0%
[libx264 @ 0429e880] mb I I16..4: 4.0% 77.1% 18.9%
[libx264 @ 0429e880] mb P I16..4: 0.4% 1.3% 0.4% P16..4: 36.6% 20.6%
30.7% 3.7% 1.5% skip: 4.9%
[libx264 @ 0429e880] mb B I16..4: 0.0% 0.0% 0.0% B16..8: 47.7% 4.8%
1.7% direct: 1.3% skip:44.4% L0:41.8% L1:40.5% BI:17.7%
[libx264 @ 0429e880] 8x8 transform intra:70.9% inter:53.0%
[libx264 @ 0429e880] direct mvs spatial:97.4% temporal:2.6%
[libx264 @ 0429e880] coded y,uvDC,uvAC intra: 81.8% 78.9% 40.8% inter:
14.5% 11.3% 2.0%
[libx264 @ 0429e880] i16 v,h,dc,p: 41% 17% 28% 14%
[libx264 @ 0429e880] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 15% 10% 18% 8% 10%
10% 9% 9% 11%
[libx264 @ 0429e880] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 15% 6% 6% 10% 13%
12% 12% 12% 13%
[libx264 @ 0429e880] i8c dc,h,v,p: 28% 28% 31% 13%
[libx264 @ 0429e880] Weighted P-Frames: Y:18.3% UV:10.0%
[libx264 @ 0429e880] ref P L0: 58.5% 17.3% 8.4% 4.3% 1.8% 2.6% 1.3%
1.3% 0.7% 0.9% 0.5% 0.6% 0.5% 0.5% 0.4% 0.5%
[libx264 @ 0429e880] ref B L0: 91.8% 3.9% 2.0% 0.6% 0.5% 0.3% 0.2%
0.1% 0.2% 0.1% 0.1% 0.1% 0.1% 0.1% 0.0%
[libx264 @ 0429e880] ref B L1: 95.5% 4.5%
[libx264 @ 0429e880] kb/s:830.59
}}}
{{{
Expected refs value: 8
Actual refs value: 16
}}}
Undocumented '-level x.y' option:
{{{
ffmpeg -i _640.360.25.avi -preset veryslow -level 3.0 output.-level3.0.mp4
ffmpeg version N-66232-g5e3da25 Copyright (c) 2000-2014 the FFmpeg
developers
built on Sep 10 2014 22:01:59 with gcc 4.8.3 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
--enable-gnutls --enab
le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-
libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-
libilbc --enable-lib
modplug --enable-libmp3lame --enable-libopencore-amrnb --enable-
libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp
--enable-libschroedinge
r --enable-libsoxr --enable-libspeex --enable-libtheora --enable-
libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-
amrwbenc --enable-libvorbis
--enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264
--enable-libx265 --enable-libxavs --enable-libxvid --enable-decklink
--enable-zlib
libavutil 54. 7.100 / 54. 7.100
libavcodec 56. 1.100 / 56. 1.100
libavformat 56. 4.101 / 56. 4.101
libavdevice 56. 0.100 / 56. 0.100
libavfilter 5. 1.100 / 5. 1.100
libswscale 3. 0.100 / 3. 0.100
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 0.100 / 53. 0.100
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, avi, from '_640.360.25.avi':
Duration: 00:00:10.00, start: 0.000000, bitrate: 7561 kb/s
Stream #0:0: Video: mpeg4 (Advanced Simple Profile) (XVID /
0x44495658), yuv420p, 640x360 [SAR 1:1 DAR 16:9], 6031 kb/s, 25 fps, 25
tbr, 25 tbn, 25 tbc
Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, 2
channels, s16, 1536 kb/s
[libx264 @ 041af7e0] using SAR=1/1
[libx264 @ 041af7e0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
AVX
[libx264 @ 041af7e0] profile High, level 3.0
[libx264 @ 041af7e0] 264 - core 142 r2479 dd79a61 - H.264/MPEG-4 AVC codec
- Copyleft 2003-2014 - http://www.videolan.org/x264.html - options:
cabac=1 ref=8 deb
lock=1:0:0 analyse=0x3:0x133 me=umh subme=10 psy=1 psy_rd=1.00:0.00
mixed_ref=1 me_range=24 chroma_me=1 trellis=2 8x8dct=1 cqm=0
deadzone=21,11 fast_pskip=1 chr
oma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0
decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=8
b_pyramid=2 b_adapt=2
b_bias=0 direct=3 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25
scenecut=40 intra_refresh=0 rc_lookahead=60 rc=crf mbtree=1 crf=23.0
qcomp=0.60 qpmin
=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'output.-level3.0.mp4':
Metadata:
encoder : Lavf56.4.101
Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p,
640x360 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc
Metadata:
encoder : Lavc56.1.100 libx264
Stream #0:1: Audio: aac (libvo_aacenc) ([64][0][0][0] / 0x0040), 48000
Hz, stereo, s16, 128 kb/s
Metadata:
encoder : Lavc56.1.100 libvo_aacenc
Stream mapping:
Stream #0:0 -> #0:0 (mpeg4 (native) -> h264 (libx264))
Stream #0:1 -> #0:1 (pcm_s16le (native) -> aac (libvo_aacenc))
Press [q] to stop, [?] for help
frame= 251 fps= 20 q=-1.0 Lsize= 1189kB time=00:00:10.01 bitrate=
972.8kbits/s dup=1 drop=0
video:1024kB audio:157kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.720318%
[libx264 @ 041af7e0] frame I:2 Avg QP:25.09 size: 36162
[libx264 @ 041af7e0] frame P:60 Avg QP:24.47 size: 12846
[libx264 @ 041af7e0] frame B:189 Avg QP:31.33 size: 1082
[libx264 @ 041af7e0] consecutive B-frames: 0.8% 6.4% 12.0% 33.5% 13.9%
33.5% 0.0% 0.0% 0.0%
[libx264 @ 041af7e0] mb I I16..4: 4.0% 77.1% 18.9%
[libx264 @ 041af7e0] mb P I16..4: 0.5% 1.2% 0.4% P16..4: 36.3% 20.6%
30.8% 3.8% 1.6% skip: 4.8%
[libx264 @ 041af7e0] mb B I16..4: 0.0% 0.1% 0.0% B16..8: 48.1% 4.7%
1.5% direct: 1.3% skip:44.3% L0:41.3% L1:40.7% BI:18.0%
[libx264 @ 041af7e0] 8x8 transform intra:68.7% inter:52.3%
[libx264 @ 041af7e0] direct mvs spatial:97.4% temporal:2.6%
[libx264 @ 041af7e0] coded y,uvDC,uvAC intra: 80.8% 78.4% 39.7% inter:
14.6% 11.3% 2.0%
[libx264 @ 041af7e0] i16 v,h,dc,p: 43% 17% 25% 15%
[libx264 @ 041af7e0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 15% 10% 18% 8% 10%
10% 10% 9% 11%
[libx264 @ 041af7e0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 16% 6% 6% 10% 12%
13% 11% 12% 13%
[libx264 @ 041af7e0] i8c dc,h,v,p: 29% 27% 31% 14%
[libx264 @ 041af7e0] Weighted P-Frames: Y:18.3% UV:10.0%
[libx264 @ 041af7e0] ref P L0: 59.9% 17.9% 8.6% 4.8% 2.1% 3.1% 1.5%
1.9% 0.2% 0.0%
[libx264 @ 041af7e0] ref B L0: 92.3% 4.0% 2.1% 0.5% 0.6% 0.3% 0.1%
[libx264 @ 041af7e0] ref B L1: 95.5% 4.5%
[libx264 @ 041af7e0] kb/s:834.70
}}}
{{{
Expected refs value: 8
Actual refs value: 8
}}}
Arguably the most consistent fix would be to correct '-x264opts level=x.y'
to behave like '-level x.y', and for '-level x.y' to also be documented.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/3947>
FFmpeg <https://ffmpeg.org>
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