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The Slip - Artworks
26 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Texte
Autres articles (105)
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Encoding and processing into web-friendly formats
13 avril 2011, parMediaSPIP automatically converts uploaded files to internet-compatible formats.
Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
All uploaded files are stored online in their original format, so you can (...) -
MediaSPIP v0.2
21 juin 2013, parMediaSPIP 0.2 is the first MediaSPIP stable release.
Its official release date is June 21, 2013 and is announced here.
The zip file provided here only contains the sources of MediaSPIP in its standalone version.
To get a working installation, you must manually install all-software dependencies on the server.
If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...) -
Gestion des droits de création et d’édition des objets
8 février 2011, parPar défaut, beaucoup de fonctionnalités sont limitées aux administrateurs mais restent configurables indépendamment pour modifier leur statut minimal d’utilisation notamment : la rédaction de contenus sur le site modifiables dans la gestion des templates de formulaires ; l’ajout de notes aux articles ; l’ajout de légendes et d’annotations sur les images ;
Sur d’autres sites (4002)
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ffmpeg does not copy custom metadata
20 juin 2015, par e110c0I’m trying to fix some videos made with an iDevice. The videos have a rotation in the metadata which is only understood by Apple and its software but noone else. Fixing this is quite simple, but I also would like to keep the other metadata in the files like the geolocation.
I tried a couple of versions, all with the same result, e.g. :
ffmpeg -i input.mov -vf vflip,hflip -map_metadata 0 -metadata:s:v:0 rotate=0 -acodec copy output.mp4
This should work, it already gives the correct preview of metadata :
ffmpeg version 1.1.2 Copyright (c) 2000-2013 the FFmpeg developers
built on Feb 8 2013 23:55:22 with Apple clang version 4.0 (tags/Apple/clang-421.0.60) (based on LLVM 3.1svn)
configuration: --prefix=/usr/local/Cellar/ffmpeg/1.1.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --cc=cc --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid
libavutil 52. 13.100 / 52. 13.100
libavcodec 54. 86.100 / 54. 86.100
libavformat 54. 59.106 / 54. 59.106
libavdevice 54. 3.102 / 54. 3.102
libavfilter 3. 32.100 / 3. 32.100
libswscale 2. 1.103 / 2. 1.103
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '2013-02-17 00.39.36.mov':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
creation_time : 2013-02-16 23:39:25
model : iPhone 5
model-deu : iPhone 5
encoder : 6.1
encoder-deu : 6.1
date : 2013-02-17T00:39:25+0100
date-deu : 2013-02-17T00:39:25+0100
location : +48.2683+007.7205+172.710/
location-deu : +48.2683+007.7205+172.710/
make : Apple
make-deu : Apple
Duration: 00:00:09.67, start: 0.000000, bitrate: 16764 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, 16696 kb/s, 24 fps, 24 tbr, 600 tbn, 1200 tbc
Metadata:
rotate : 180
creation_time : 2013-02-16 23:39:25
handler_name : Core Media Data Handler
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 61 kb/s
Metadata:
creation_time : 2013-02-16 23:39:25
handler_name : Core Media Data Handler
w:1920 h:1080 pixfmt:yuv420p tb:1/600 fr:24/1 sar:0/1 sws_param:flags=2
[libx264 @ 0x7fc248829a00] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX
[libx264 @ 0x7fc248829a00] profile High, level 4.0
[libx264 @ 0x7fc248829a00] 264 - core 125 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=24 scenecut=40 intra_refresh=0 rc_lookahead=40 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.mp4':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
creation_time : 2013-02-16 23:39:25
model : iPhone 5
model-deu : iPhone 5
encoder-deu : 6.1
date : 2013-02-17T00:39:25+0100
date-deu : 2013-02-17T00:39:25+0100
location : +48.2683+007.7205+172.710/
location-deu : +48.2683+007.7205+172.710/
make : Apple
make-deu : Apple
encoder : Lavf54.59.106
Stream #0:0(und): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1920x1080, q=-1--1, 12288 tbn, 24 tbc
Metadata:
handler_name : Core Media Data Handler
creation_time : 2013-02-16 23:39:25
rotate : 0
Stream #0:1(und): Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, mono, 61 kb/s
Metadata:
creation_time : 2013-02-16 23:39:25
handler_name : Core Media Data Handler
Stream mapping:
Stream #0:0 -> #0:0 (h264 -> libx264)
Stream #0:1 -> #0:1 (copy)But the resulting file keeps only some of these metadata tags :
ffmpeg -i output.mp4
shows :
fmpeg version 1.1.2 Copyright (c) 2000-2013 the FFmpeg developers
built on Feb 8 2013 23:55:22 with Apple clang version 4.0 (tags/Apple/clang-421.0.60) (based on LLVM 3.1svn)
configuration: --prefix=/usr/local/Cellar/ffmpeg/1.1.2 --enable-shared --enable-pthreads - -enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --cc=cc --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid
libavutil 52. 13.100 / 52. 13.100
libavcodec 54. 86.100 / 54. 86.100
libavformat 54. 59.106 / 54. 59.106
libavdevice 54. 3.102 / 54. 3.102
libavfilter 3. 32.100 / 3. 32.100
libswscale 2. 1.103 / 2. 1.103
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2mp41
creation_time : 2013-02-16 23:39:25
date : 2013-02-17T00:39:25+0100
encoder : Lavf54.59.106
Duration: 00:00:09.67, start: 0.000000, bitrate: 3286 kb/s
Stream #0:0(und): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 3219 kb/s, 24 fps, 24 tbr, 12288 tbn, 24 tbc
Metadata:
creation_time : 2013-02-16 23:39:25
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 61 kb/s
Metadata:
creation_time : 2013-02-16 23:39:25
handler_name : SoundHandlerI also tried to add the one tag I’m interested in by hand with
-metadata:g location=+48.2683+007.7205+172.710/
with no change in the result.
Output as .mov doesn’t change anything, neither.
Is there any trick to add non-standard metadata ? How do I get the location back in there ?
Thanks in advance to anyone who can give some insight on this.
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compile ffmpeg with alsa support on Ubuntu 12.04 amd64
6 octobre 2015, par user1129812I had followed the ffmpeg compile instructions described in "CompilationGuide/Ubuntu – FFmpeg" and had successfully compiled a version of ffmpeg on my Ubuntu 12.04 amd64 system. This compiled version of ffmpeg works ok for my normal usage. However, recently, I want to grab my Ubuntu desktop with sound from applications, I follow the instructions in "HOWTO : Proper Screencasting on Linux" and I use the command :
~/bin/ffmpeg -f alsa -ac 2 -i hw:0 -f x11grab -r 30 -s 1024x768 -i :0.0 -acodec pcm_s16le -vcodec libx264 -preset ultrafast -crf 0 -threads 0 out_video_test.mkv
to want to grab my Ubuntu desktop with sound from application. The terminal output from this command is :
ffmpeg version 2.4.git Copyright (c) 2000-2014 the FFmpeg developers
built on Oct 13 2014 17:38:17 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
configuration: --prefix=/home/tkwinfo/ffmpeg_build --extra-cflags=-I/home/tkwinfo/ffmpeg_build/include --extra-ldflags=-L/home/tkwinfo/ffmpeg_build/lib --bindir=/home/tkwinfo/bin --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-x11grab
libavutil 54. 10.100 / 54. 10.100
libavcodec 56. 4.101 / 56. 4.101
libavformat 56. 9.100 / 56. 9.100
libavdevice 56. 1.100 / 56. 1.100
libavfilter 5. 1.103 / 5. 1.103
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 1.100 / 53. 1.100
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, alsa, from 'hw:0':
Duration: N/A, start: 1444111224.703996, bitrate: 1536 kb/s
Stream #0:0: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s
[x11grab @ 0x3971360] device: :0.0 -> display: :0.0 x: 0 y: 0 width: 1024 height: 768
[x11grab @ 0x3971360] shared memory extension found
Input #1, x11grab, from ':0.0':
Duration: N/A, start: 1444111224.739397, bitrate: 754974 kb/s
Stream #1:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1024x768, 754974 kb/s, 30 tbr, 1000k tbn, 30 tbc
No pixel format specified, yuv444p for H.264 encoding chosen.
Use -pix_fmt yuv420p for compatibility with outdated media players.
[libx264 @ 0x39941e0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 0x39941e0] profile High 4:4:4 Predictive, level 3.1, 4:4:4 8-bit
[libx264 @ 0x39941e0] 64 - core 142 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=0 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=0 chroma_qp_offset=0 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=cqp mbtree=0 qp=0
Output #0, matroska, to 'out_video_test.mkv':
Metadata:
encoder : Lavf56.9.100
Stream #0:0: Video: h264 (libx264) (H264 / 0x34363248), yuv444p, 1024x768, q=-1--1, 30 fps, 1k tbn, 30 tbc
Metadata:
encoder : Lavc56.4.101 libx264
Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s16, 1536 kb/s
Metadata:
encoder : Lavc56.4.101 pcm_s16le
Stream mapping:
Stream #1:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
Stream #0:0 -> #0:1 (pcm_s16le (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
frame= 16 fps=0.0 q=0.0 size= 1370kB time=00:00:00.54 bitrate=20438.5kbits/
frame= 31 fps= 31 q=0.0 size= etc, etcThe video part is grabbed ok but there is no sound in the output video. I had followed the procedures described in the FAQ in "HOWTO : Proper Screencasting on Linux" to use "pavucontrol" to set "capture application audio instead of mic". However, I still could only grab video from my Ubuntu desktop.
I find that I have installed libasound2-dev in my Ubuntu 12.04 amd64 system. The "libasound.so" file is in /usr/lib/x86_64-linux-gnu while the "asoundlib.h" file is in /usr/include/alsa. The config options when I compile ffmpeg is :
PATH="$PATH:$HOME/bin" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./configure
--prefix="$HOME/ffmpeg_build"
--extra-cflags="-I$HOME/ffmpeg_build/include"
--extra-ldflags="-L$HOME/ffmpeg_build/lib"
--bindir="$HOME/bin"
--enable-gpl
--enable-libass
--enable-libfdk-aac
--enable-libfreetype
--enable-libmp3lame
--enable-libopus
--enable-libtheora
--enable-libvorbis
--enable-libvpx
--enable-libx264
--enable-nonfree
--enable-x11grabI want to know that how do I find out whether I have compiled the alsa support into my ffmpeg ? Do I need to add the ffmpeg config option
--extra-libs=-lasound
to get alsa support when compiling ffmpeg ? (as described in some discussions in the internet) If yes, how do I specify the paths of "libasound.so" and "asoundlib.h" so that they would be used in the ffmpeg compilation process ?
Moreover, if alsa support is already compiled in my ffmpeg, what else should I try so as to be able to grab sound from application using my ffmpeg ?
Any idea. Thanks for any suggestion.
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ffmpeg doesn't correctly work with mkv
26 avril 2017, par AlexNow I’m trying to trim mkv file with ffmpeg command.
ffmpeg -y -i 1.mkv -filter_complex "[0:0]trim=start=201:duration=28,setpts=PTS-STARTPTS" a.mp4
after processing a.mp4 is created with length(28s), but there is problems.
- Video is some flapped while playing.
- Audio is continued though playing has ended beyond 28s.
So could you guys tell me what can I do ?
When ffmpeg processing, it shows some errors as like this :
D:\Work\ffmpeg\files> ffmpeg -y -i 1.mkv -filter_complex "[0:0]trim=start=201:duration=28,setpts=PTS-STARTPTS" a.mp4
ffmpeg version N-77883-gd7c75a5 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 5.2.0 (GCC)
configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --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-libzimg --enable-lzma --enable-decklink --enable-zlib
libavutil 55. 13.100 / 55. 13.100
libavcodec 57. 22.100 / 57. 22.100
libavformat 57. 21.101 / 57. 21.101
libavdevice 57. 0.100 / 57. 0.100
libavfilter 6. 25.100 / 6. 25.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
Guessed Channel Layout for Input Stream #0.1 : mono
Input #0, matroska,webm, from '1.mkv':
Metadata:
ENCODER : Lavf56.1.0
Duration: 00:35:40.08, start: 0.000000, bitrate: 348 kb/s
Stream #0:0: Video: vp8, yuv420p, 640x480, SAR 1:1 DAR 4:3, 29.97 fps, 29.97 tbr, 1k tbn, 1k tbc
Stream #0:1: Audio: pcm_mulaw ([7][0][0][0] / 0x0007), 8000 Hz, 1 channels, s16, 64 kb/s
[libx264 @ 000002859baf3300] using SAR=1/1
[libx264 @ 000002859baf3300] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 000002859baf3300] profile High, level 3.0
[libx264 @ 000002859baf3300] 264 - core 148 r2638 7599210 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 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 'a.mp4':
Metadata:
encoder : Lavf57.21.101
Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 640x480 [SAR 1:1 DAR 4:3], q=-1--1, 29.97 fps, 30k tbn, 29.97 tbc
Metadata:
encoder : Lavc57.22.100 libx264
Side data:
unknown side data type 10 (24 bytes)
Stream #0:1: Audio: aac (LC) ([64][0][0][0] / 0x0040), 8000 Hz, mono, fltp, 48 kb/s
Metadata:
encoder : Lavc57.22.100 aac
Stream mapping:
Stream #0:0 (vp8) -> trim (graph 0)
setpts (graph 0) -> Stream #0:0 (libx264)
Stream #0:1 -> #0:1 (pcm_mulaw (native) -> aac (native))
Press [q] to stop, [?] for help
[vp8 @ 000002859d9ae460] Discarding interframe without a prior keyframe!
[vp8 @ 000002859d9aeb00] Discarding interframe without a prior keyframe!
[vp8 @ 000002859e8eee40] Discarding interframe without a prior keyframe!
[vp8 @ 000002859e8f5460] Discarding interframe without a prior keyframe!
Error while decoding stream #0:0: Invalid data found when processing input
Last message repeated 3 times
frame= 0 fps=0.0 q=0.0 size= 62kB time=00:00:22.27 bitrate= 22.6kbits/s
frame= 0 fps=0.0 q=0.0 size= 154kB time=00:00:41.08 bitrate= 30.6kbits/s
frame= 0 fps=0.0 q=0.0 size= 255kB time=00:01:02.20 bitrate= 33.6kbits/s
frame= 0 fps=0.0 q=0.0 size= 340kB time=00:01:19.34 bitrate= 35.1kbits/s
frame= 0 fps=0.0 q=0.0 size= 423kB time=00:01:39.31 bitrate= 34.9kbits/s
frame= 88 fps= 29 q=29.0 size= 518kB time=00:01:43.79 bitrate= 40.9kbits/
frame= 140 fps= 40 q=29.0 size= 613kB time=00:01:45.46 bitrate= 47.6kbits/
frame= 194 fps= 48 q=29.0 size= 719kB time=00:01:47.38 bitrate= 54.8kbits/
...
frame= 839 fps= 14 q=29.0 size= 10881kB time=00:34:51.52 bitrate= 42.6kbits/
frame= 839 fps= 14 q=29.0 size= 10962kB time=00:35:10.46 bitrate= 42.5kbits/
frame= 839 fps= 14 q=29.0 size= 11031kB time=00:35:25.44 bitrate= 42.5kbits/
frame= 839 fps= 14 q=-1.0 Lsize= 11266kB time=00:35:40.16 bitrate= 43.1kbits/s dup=284 drop=328 speed=34.6x
video:1083kB audio:10104kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.706855%
[libx264 @ 000002859baf3300] frame I:4 Avg QP:15.24 size: 22651
[libx264 @ 000002859baf3300] frame P:305 Avg QP:19.95 size: 2626
[libx264 @ 000002859baf3300] frame B:530 Avg QP:25.41 size: 408
[libx264 @ 000002859baf3300] consecutive B-frames: 15.7% 0.0% 0.4% 83.9%
[libx264 @ 000002859baf3300] mb I I16..4: 15.9% 63.7% 20.4%
[libx264 @ 000002859baf3300] mb P I16..4: 0.3% 1.9% 0.3% P16..4: 22.3% 6.2% 2.4% 0.0% 0.0% skip:66.5%
[libx264 @ 000002859baf3300] mb B I16..4: 0.0% 0.1% 0.0% B16..8: 16.1% 0.6% 0.1% direct: 0.2% skip:82.9% L0:48.2% L1:48.5% BI: 3.4%
[libx264 @ 000002859baf3300] 8x8 transform intra:71.1% inter:71.4%
[libx264 @ 000002859baf3300] coded y,uvDC,uvAC intra: 72.2% 78.3% 40.7% inter: 5.9% 4.0% 0.1%
[libx264 @ 000002859baf3300] i16 v,h,dc,p: 29% 30% 21% 20%
[libx264 @ 000002859baf3300] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 28% 18% 14% 5% 6% 9% 6% 9% 6%
[libx264 @ 000002859baf3300] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 38% 20% 11% 5% 5% 7% 5% 6% 4%
[libx264 @ 000002859baf3300] i8c dc,h,v,p: 46% 16% 27% 11%
[libx264 @ 000002859baf3300] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 000002859baf3300] ref P L0: 63.4% 21.5% 11.5% 3.6%
[libx264 @ 000002859baf3300] ref B L0: 92.6% 6.4% 1.0%
[libx264 @ 000002859baf3300] ref B L1: 96.4% 3.6%
[libx264 @ 000002859baf3300] kb/s:316.59
[aac @ 000002859baf4400] Qavg: 65377.508
D:\Work\ffmpeg\files>