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Carte de Schillerkiez
13 mai 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Texte
Autres articles (62)
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Publier sur MédiaSpip
13 juin 2013Puis-je poster des contenus à partir d’une tablette Ipad ?
Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir -
Taille des images et des logos définissables
9 février 2011, parDans beaucoup d’endroits du site, logos et images sont redimensionnées pour correspondre aux emplacements définis par les thèmes. L’ensemble des ces tailles pouvant changer d’un thème à un autre peuvent être définies directement dans le thème et éviter ainsi à l’utilisateur de devoir les configurer manuellement après avoir changé l’apparence de son site.
Ces tailles d’images sont également disponibles dans la configuration spécifique de MediaSPIP Core. La taille maximale du logo du site en pixels, on permet (...) -
Contribute to a better visual interface
13 avril 2011MediaSPIP is based on a system of themes and templates. Templates define the placement of information on the page, and can be adapted to a wide range of uses. Themes define the overall graphic appearance of the site.
Anyone can submit a new graphic theme or template and make it available to the MediaSPIP community.
Sur d’autres sites (9066)
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Rails FFMPEG - convert to webm gives error for encoder 'libvpx-vp9'
7 mai 2019, par MilindI am testing video conversion to convert video file into mp4 and webm.
I have also setup ffmpeg and compiled properly.Mp4 conversion succeeds but webm breaks always complaining as -The encoder 'libvpx-vp9' is experimental but experimental codecs are not enabled, add '-strict -2' if you want to use it.its strange as I aready have vp8 present -
mike1011:~/workspace (s1) $ ffmpeg -encoders | grep -i vp
ffmpeg version git-2016-03-29-bf1495d Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.1)
configuration: --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-version3
libavutil 55. 19.100 / 55. 19.100
libavcodec 57. 32.100 / 57. 32.100
libavformat 57. 29.101 / 57. 29.101
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 40.102 / 6. 40.102
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
V..... libvpx libvpx VP8 (codec vp8)
V..X.. libvpx-vp9 libvpx VP9 (codec vp9)
V..... wrapped_avframe AVFrame to AVPacket passthrough
A..... wavpack WavPackmy model..video.rb looks like -
has_attached_file :video,
:styles => {
:mp4video => { :geometry => '1280x720>', :format => 'mp4',
:convert_options => { :output => { :vcodec => 'libx264', :movflags => '+faststart', :strict => :experimental} } },
:webmvideo => { :geometry => '1280x720>', :format => 'webm',
:convert_options => { :output => { :vcodec => 'libvpx-vp9'} } },
:oggvideo => { :geometry => '1280x720>', :format => 'ogg',
:convert_options => { :output => { :vcodec => 'libtheora',
:acodec => 'libvorbis', :strict => :experimental } } },
screenshot: { geometry: '640x480#', :convert_options => {
:output => { :vframes => 1, :s => '300x169', :ss => '00:00:02'} } }
},
:processors => [:transcoder],
###other setting comes here
##using delayed-paperclip for background processing of videos
process_in_background :video
def process_delayed!
unless self.video.job_is_processing
self.video.job_is_processing = true
self.video.post_processing = true
self.video.reprocess!
self.video.job_is_processing = false
end
endI am sharing my complete output below(with error highlighted :)) -
2.4.1 :003 > v=Video.find 25
Video Load (1.8ms) SELECT "videos".* FROM "videos" WHERE "videos"."id" = $1 LIMIT 1 [["id", 25]]
=> #<video></video>mp4", video_file_size: 1105773, video_updated_at: "2019-02-02 00:17:37", duration: 18.112, slug: "sample320-mp4-dbb96526-5db1-4c59-9152-615fc077eca7", active: true, created_at: "2019-02-02 00:17:37", updated_at: "2019-02-02 00:17:37", video_processing: true>
2.4.1 :004 > v.process_delayed!
[paperclip] copying /videos/25/original/Sample320.mp4 to local file /tmp/6b5665997c56c12544e7069276f6660b20190203-677953-1jsw8d1.mp4
[paperclip] Trying to link /tmp/6b5665997c56c12544e7069276f6660b20190203-677953-1jsw8d1.mp4 to /tmp/6b5665997c56c12544e7069276f6660b20190203-677953-1qmn2uk.mp4
I, [2019-02-03T00:12:09.849885 #677953] INFO -- : Running transcoding...
["/usr/local/bin/ffmpeg", "-y", "-i", "/tmp/6b5665997c56c12544e7069276f6660b20190203-677953-1jsw8d1.mp4", "-s", "360x240", "-aspect", "1.5", "/tmp/2f51a6ecbce019dcad28a46b5be980ec20190203-677953-rh2lh0.mp4"]
I, [2019-02-03T00:12:16.060391 #677953] INFO -- : Transcoding of /tmp/6b5665997c56c12544e7069276f6660b20190203-677953-1jsw8d1.mp4 to /tmp/2f51a6ecbce019dcad28a46b5be980ec20190203-677953-rh2lh0.mp4 succeeded
[paperclip] Trying to link /tmp/2f51a6ecbce019dcad28a46b5be980ec20190203-677953-rh2lh0.mp4 to /tmp/2961027361de4afbbb86f7764a034ee020190203-677953-1g0vvwe.mp4
I, [2019-02-03T00:12:16.082499 #677953] INFO -- : Running transcoding...
["/usr/local/bin/ffmpeg", "-y", "-i", "/tmp/6b5665997c56c12544e7069276f6660b20190203-677953-1jsw8d1.mp4", "-s", "360x240", "-aspect", "1.5", "/tmp/2f51a6ecbce019dcad28a46b5be980ec20190203-677953-fv3pzs.webm"]
E, [2019-02-03T00:12:16.202420 #677953] ERROR -- : Failed encoding...
["/usr/local/bin/ffmpeg", "-y", "-i", "/tmp/6b5665997c56c12544e7069276f6660b20190203-677953-1jsw8d1.mp4", "-s", "360x240", "-aspect", "1.5", "/tmp/2f51a6ecbce019dcad28a46b5be980ec20190203-677953-fv3pzs.webm"]
ffmpeg version git-2016-03-29-bf1495d Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.1)
configuration: --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-version3
libavutil 55. 19.100 / 55. 19.100
libavcodec 57. 32.100 / 57. 32.100
libavformat 57. 29.101 / 57. 29.101
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 40.102 / 6. 40.102
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/tmp/6b5665997c56c12544e7069276f6660b20190203-677953-1jsw8d1.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.76.100
Duration: 00:00:18.11, start: 0.000000, bitrate: 488 kb/s
Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 360x240 [SAR 32:27 DAR 16:9], 353 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 129 kb/s (default)
Metadata:
handler_name : SoundHandler
XXXXXXXXXXXXXXXXXXXXXXXX====== HERE COMES THE ERROR========XXXXXXXXXXXX
[libvpx-vp9 @ 0x3e3dec0] The encoder 'libvpx-vp9' is experimental but experimental codecs are not enabled, add '-strict -2' if you want to use it.
Errors: encoded file is invalid.
Paperclip::Error: There was an error processing the transcoder for 6b5665997c56c12544e7069276f6660b20190203-677953-1jsw8d1
... -
How to comvert MOV to MP4 with metadata [closed]
11 janvier 2020, par Nadav RosenbergI’m trying to convert mov videos from iphone to mp4 videos but I want to save the metadata.
I had tried some options but ffmpeg for android seems the best.Does any one have some kind of a template that I can just implement it ?
I don’t have a clue how to write in ffmpeg ..[screenshot from the app][1]
[another screenshot from the app][2]
log (the input is different then in the screenshot) :
ffmpeg -y -i "/storage/9C33-6BBD/DCIM/×¢×™× ×‘/IMG_5267.MOV" -c:v libx265 -q:v 5 -c:a aac -ab 128k -ar 44100 "/storage/emulated/0/FFMPEG/IMG_5267.mp4"
ffmpeg version 4.2.1 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 4.9.x (GCC) 20150123 (prerelease)
configuration: --enable-version3 --enable-gpl --enable-nonfree --disable-indev=v4l2 --enable-libmp3lame --enable-libx264 --enable-libx265 --enable-libvpx --enable-libvorbis --enable-libtheora --enable-libopus --enable-libfdk-aac --enable-libfreetype --enable-libass --enable-libfribidi --enable-fontconfig --enable-pthreads --enable-libxvid --enable-filters --enable-openssl --enable-librtmp --disable-protocol='udp,udplite' --enable-libopencore-amrwb --enable-libopencore-amrnb --enable-libvo-amrwbenc --enable-libspeex --enable-libsoxr --enable-libwavpack --enable-libwebp --enable-libxml2 --enable-libopenh264 --enable-mediacodec --enable-jni --prefix=/home/silentlexx/AndroidstudioProjects/ffmpeg/ffmpeg/build/arm64-api21-r13b --sysroot=/home/silentlexx/Android/android-ndk-r13b/platforms/android-21/arch-arm64 --arch=arm64 --disable-shared --enable-static --enable-pic --enable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffnvcodec --disable-avdevice --disable-debug --disable-doc --disable-htmlpages --disable-manpages --disable-podpages --disable-txtpages --disable-symver --cross-prefix=/home/silentlexx/Android/android-ndk-r13b/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/aarch64-linux-android- --target-os=android --enable-cross-compile --pkg-config-flags=--static --extra-libs='-lgnustl_static -lm -lpng -l:libz.so -lpthread' --enable-asm --enable-neon --enable-libxavs2 --disable-runtime-cpudetect --enable-small
libavutil 56. 31.100 / 56. 31.100
libavcodec 58. 54.100 / 58. 54.100
libavformat 58. 29.100 / 58. 29.100
libavfilter 7. 57.100 / 7. 57.100
libswscale 5. 5.100 / 5. 5.100
libswresample 3. 5.100 / 3. 5.100
libpostproc 55. 5.100 / 55. 5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/9C33-6BBD/DCIM/×¢×™× ×‘/IMG_5267.MOV':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
creation_time : 2020-01-04T10:43:12.000000Z
com.apple.quicktime.make: Apple
com.apple.quicktime.model: iPhone 8 Plus
com.apple.quicktime.software: 12.4.1
com.apple.quicktime.creationdate: 2020-01-03T22:09:55+0200
com.apple.photos.originating.signature: AXIrrckzUSuTNLamJ909jOgUZ8Mr
Duration: 00:00:17.40, start: 0.000000, bitrate: 17343 kb/s
Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080, 16511 kb/s, 30.01 fps, 30 tbr, 600 tbn, 1200 tbc (default)
Metadata:
creation_time : 2020-01-04T10:43:12.000000Z
handler_name : Core Media Video
encoder : H.264
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 101 kb/s (default)
Metadata:
creation_time : 2020-01-04T10:43:12.000000Z
handler_name : Core Media Audio
Stream #0:2(und): Data: none (mebx / 0x7862656D), 33 kb/s (default)
Metadata:
creation_time : 2020-01-04T10:43:12.000000Z
handler_name : Core Media Metadata
Stream #0:3(und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
Metadata:
creation_time : 2020-01-04T10:43:12.000000Z
handler_name : Core Media Metadata
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> hevc (libx265))
Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
x265 [info]: HEVC encoder version 3.1×de920e0a3183
x265 [info]: build info [Linux][GCC 4.9.0][32 bit][noasm] 8bit
x265 [info]: using cpu capabilities: none!
x265 [info]: Main profile, Level-4 (Main tier)
x265 [info]: Thread pool created using 8 threads
x265 [info]: Slices : 1
x265 [info]: frame threads / pool features : 3 / wpp(17 rows)
x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
x265 [info]: Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra
x265 [info]: ME / range / subpel / merge : hex / 57 / 2 / 3
x265 [info]: Keyframe min / max / scenecut / bias: 25 / 250 / 40 / 5.00
x265 [info]: Lookahead / bframes / badapt : 20 / 4 / 2
x265 [info]: b-pyramid / weightp / weightb : 1 / 1 / 0
x265 [info]: References / ref-limit cu / depth : 3 / off / on
x265 [info]: AQ: mode / str / qg-size / cu-tree : 2 / 1.0 / 32 / 1
x265 [info]: Rate Control / qCompress : CRF-28.0 / 0.60
x265 [info]: tools: rd=3 psy-rd=2.00 early-skip rskip signhide tmvp b-intra
x265 [info]: tools: strong-intra-smoothing lslices=6 deblock sao
Output #0, mp4, to '/storage/emulated/0/FFMPEG/IMG_5267.mp4':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
com.apple.photos.originating.signature: AXIrrckzUSuTNLamJ909jOgUZ8Mr
com.apple.quicktime.make: Apple
com.apple.quicktime.model: iPhone 8 Plus
com.apple.quicktime.software: 12.4.1
com.apple.quicktime.creationdate: 2020-01-03T22:09:55+0200
encoder : Lavf58.29.100
Stream #0:0(und): Video: hevc (libx265) (hev1 / 0x31766568), yuv420p, 1920x1080, q=2-31, 30 fps, 15360 tbn, 30 tbc (default)
Metadata:
creation_time : 2020-01-04T10:43:12.000000Z
handler_name : Core Media Video
encoder : Lavc58.54.100 libx265
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 128 kb/s (default)
Metadata:
creation_time : 2020-01-04T10:43:12.000000Z
handler_name : Core Media Audio
encoder : Lavc58.54.100 aac
frame= 27 fps= 13 q=0.0 size= 0kB time=00:00:02.08 bitrate= 0.2kbits/s speed=1.02x
frame= 30 fps=9.1 q=-0.0 size= 0kB time=00:00:02.18 bitrate= 0.2kbits/s speed=0.665x
frame= 31 fps=8.1 q=-0.0 size= 0kB time=00:00:02.22 bitrate= 0.2kbits/s speed=0.581x
frame= 32 fps=7.3 q=-0.0 size= 0kB time=00:00:02.25 bitrate= 0.2kbits/s speed=0.511x
frame= 33 fps=5.9 q=-0.0 size= 0kB time=00:00:02.29 bitrate= 0.2kbits/s speed=0.409x
frame= 36 fps=5.4 q=-0.0 size= 0kB time=00:00:02.39 bitrate= 0.1kbits/s speed=0.359x
frame= 37 fps=5.0 q=-0.0 size= 0kB time=00:00:02.41 bitrate= 0.1kbits/s speed=0.324x
frame= 40 fps=4.5 q=-0.0 size= 0kB time=00:00:02.53 bitrate= 0.1kbits/s speed=0.287x
frame= 43 fps=4.3 q=-0.0 size= 0kB time=00:00:02.62 bitrate= 0.1kbits/s speed=0.265x
frame= 44 fps=4.1 q=-0.0 size= 0kB time=00:00:02.64 bitrate= 0.1kbits/s speed=0.248x
frame= 45 fps=3.9 q=-0.0 size= 0kB time=00:00:02.69 bitrate= 0.1kbits/s speed=0.231x
frame= 48 fps=3.7 q=-0.0 size= 0kB time=00:00:02.78 bitrate= 0.1kbits/s speed=0.217x
frame= 50 fps=3.7 q=-0.0 size= 0kB time=00:00:02.85 bitrate= 0.1kbits/s speed=0.214x
frame= 51 fps=3.4 q=-0.0 size= 0kB time=00:00:02.87 bitrate= 0.1kbits/s speed=0.195x
frame= 54 fps=3.2 q=-0.0 size= 256kB time=00:00:02.99 bitrate= 700.2kbits/s speed=0.18x
frame= 57 fps=3.2 q=-0.0 size= 256kB time=00:00:03.08 bitrate= 679.2kbits/s speed=0.174x
frame= 58 fps=3.1 q=-0.0 size= 256kB time=00:00:03.11 bitrate= 674.1kbits/s speed=0.169x
frame= 59 fps=3.1 q=-0.0 size= 256kB time=00:00:03.15 bitrate= 664.2kbits/s speed=0.165x
frame= 61 fps=3.0 q=-0.0 size= 256kB time=00:00:03.22 bitrate= 649.9kbits/s speed=0.161x
frame= 62 fps=3.0 q=-0.0 size= 256kB time=00:00:03.25 bitrate= 645.2kbits/s speed=0.157x
frame= 63 fps=2.9 q=-0.0 size= 256kB time=00:00:03.29 bitrate= 636.1kbits/s speed=0.152x
frame= 65 fps=2.9 q=-0.0 size= 256kB time=00:00:03.34 bitrate= 627.3kbits/s speed=0.149x
frame= 66 fps=2.9 q=-0.0 size= 256kB time=00:00:03.39 bitrate= 618.7kbits/s speed=0.147x
frame= 68 fps=2.9 q=-0.0 size= 256kB time=00:00:03.45 bitrate= 606.3kbits/s speed=0.146x
frame= 69 fps=2.8 q=-0.0 size= 256kB time=00:00:03.48 bitrate= 602.2kbits/s speed=0.142x
frame= 70 fps=2.8 q=-0.0 size= 256kB time=00:00:03.52 bitrate= 594.3kbits/s speed=0.14x
frame= 72 fps=2.8 q=-0.0 size= 256kB time=00:00:03.59 bitrate= 582.8kbits/s speed=0.14x
frame= 73 fps=2.8 q=-0.0 size= 256kB time=00:00:03.62 bitrate= 579.1kbits/s speed=0.136x
frame= 74 fps=2.7 q=-0.0 size= 256kB time=00:00:03.64 bitrate= 575.4kbits/s speed=0.134x
frame= 76 fps=2.7 q=-0.0 size= 256kB time=00:00:03.71 bitrate= 564.6kbits/s speed=0.132x
frame= 77 fps=2.7 q=-0.0 size= 256kB time=00:00:03.76 bitrate= 557.6kbits/s speed=0.13x
frame= 79 fps=2.7 q=-0.0 size= 256kB time=00:00:03.83 bitrate= 547.5kbits/s speed=0.131x
frame= 80 fps=2.7 q=-0.0 size= 512kB time=00:00:03.85 bitrate=1088.2kbits/s speed=0.129x
frame= 82 fps=2.6 q=-0.0 size= 512kB time=00:00:03.92 bitrate=1068.9kbits/s speed=0.127x
frame= 83 fps=2.6 q=-0.0 size= 512kB time=00:00:03.94 bitrate=1062.6kbits/s speed=0.125x
frame= 84 fps=2.6 q=-0.0 size= 512kB time=00:00:03.99 bitrate=1050.3kbits/s speed=0.124x
frame= 87 fps=2.6 q=-0.0 size= 512kB time=00:00:04.08 bitrate=1026.4kbits/s speed=0.122x
frame= 89 fps=2.6 q=-0.0 size= 512kB time=00:00:04.15 bitrate=1009.2kbits/s speed=0.12x
frame= 90 fps=2.6 q=-0.0 size= 512kB time=00:00:04.17 bitrate=1003.6kbits/s speed=0.119x
frame= 92 fps=2.6 q=-0.0 size= 512kB time=00:00:04.24 bitrate= 987.2kbits/s speed=0.119x
frame= 93 fps=2.5 q=-0.0 size= 512kB time=00:00:04.29 bitrate= 976.5kbits/s speed=0.118x
frame= 94 fps=2.5 q=-0.0 size= 512kB time=00:00:04.31 bitrate= 971.2kbits/s speed=0.116x
frame= 96 fps=2.5 q=-0.0 size= 512kB time=00:00:04.38 bitrate= 955.8kbits/s speed=0.116x
frame= 97 fps=2.5 q=-0.0 size= 512kB time=00:00:04.41 bitrate= 950.8kbits/s speed=0.115x
frame= 100 fps=2.5 q=-0.0 size= 512kB time=00:00:04.52 bitrate= 926.4kbits/s speed=0.113x
frame= 101 fps=2.5 q=-0.0 size= 512kB time=00:00:04.55 bitrate= 921.7kbits/s speed=0.111x
frame= 103 fps=2.5 q=-0.0 size= 512kB time=00:00:04.62 bitrate= 907.8kbits/s speed=0.112x
frame= 104 fps=2.5 q=-0.0 size= 512kB time=00:00:04.64 bitrate= 903.2kbits/s speed=0.11x
frame= 105 fps=2.5 q=-0.0 size= 512kB time=00:00:04.69 bitrate= 894.3kbits/s speed=0.11x
frame= 106 fps=2.4 q=-0.0 size= 512kB time=00:00:04.71 bitrate= 889.9kbits/s speed=0.109x
frame= 107 fps=2.4 q=-0.0 size= 512kB time=00:00:04.76 bitrate= 881.2kbits/s speed=0.108x
frame= 108 fps=2.4 q=-0.0 size= 512kB time=00:00:04.78 bitrate= 876.9kbits/s speed=0.105x
frame= 111 fps=2.4 q=-0.0 size= 768kB time=00:00:04.89 bitrate=1284.2kbits/s speed=0.105x
frame= 112 fps=2.4 q=-0.0 size= 768kB time=00:00:04.92 bitrate=1278.1kbits/s speed=0.104x
frame= 115 fps=2.4 q=-0.0 size= 768kB time=00:00:05.01 bitrate=1254.5kbits/s speed=0.103x
frame= 116 fps=2.4 q=-0.0 size= 768kB time=00:00:05.06 bitrate=1243.0kbits/s speed=0.103x
frame= 119 fps=2.4 q=-0.0 size= 768kB time=00:00:05.15 bitrate=1220.6kbits/s speed=0.102x
frame= 120 fps=2.3 q=-0.0 size= 768kB time=00:00:05.17 bitrate=1215.1kbits/s speed=0.101x
frame= 121 fps=2.3 q=-0.0 size= 768kB time=00:00:05.22 bitrate=1204.3kbits/s speed=0.0998x
frame= 124 fps=2.3 q=-0.0 size= 768kB time=00:00:05.31 bitrate=1183.3kbits/s speed= 0.1x
frame= 126 fps=2.3 q=-0.0 size= 768kB time=00:00:05.38 bitrate=1168.0kbits/s speed=0.0983x
frame= 129 fps=2.3 q=-0.0 size= 768kB time=00:00:05.47 bitrate=1148.2kbits/s speed=0.0985x
frame= 130 fps=2.3 q=-0.0 size= 768kB time=00:00:05.52 bitrate=1138.5kbits/s speed=0.0984x
frame= 131 fps=2.3 q=-0.0 size= 768kB time=00:00:05.54 bitrate=1133.7kbits/s speed=0.0975x
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Improve ffmpeg x11grab screen capture performance
10 janvier 2020, par Toby EggittI have been doing screen-only (no sound) capture using ffmpeg with libx264 for the encoding quite successfully on an old machine built around a Core2 Quad Q6600 processor. I now need to include audio in this, but the fans on this ancient machine are too loud. So, I found a fanless motherboard (https://www.asrock.com/mb/Intel/J5005-ITX/index.asp) that has an Intel Pentium Silver J5005 processor and decided to use this instead. The CPU’s benchmarks put it in a similar bracket to the Q6600, and the general performance seems to be significantly better, presumably at least in part because it’s now using DDR4 memory that’s faster access.
However, the machine fails horribly at the screen capture. It’s missing frames all over the place ; I actually end up with video that’s missing almost half the frames, and plays back at about double speed. Also, any audio is just messed up so badly I can hardly think how to describe it, best I can come up with is that I get perhaps a quarter second of sound then a few seconds pause (the video meanwhile is actually still playing back, albeit with no sense of time).
Some things occur to me that might be the cause, or cure, of my troubles, some of which I might be able to fix, others not so much. What other things should I try ? (I’d prefer to avoid simply throwing money at the issue with random ideas that are baseless !)
1) perhaps the CPU lacks some "extensions" to the instruction set (I recall years ago some CPUs gaining MMX extensions") so that the CPU is fast at mundane computing but sucks at video encoding.
2) perhaps the fact that the old machine had a dedicated graphics card, while this new one is sharing main memory with the graphics system means that reading the screen pixels is much slower.
3) perhaps the fact that this new machine has a single DDR4 memory stick in it means that I’m forcing all the memory reads and writes for the computations through the same memory as is holding the screen, and that’s too much (implying that adding an additional memory stick might jus possibly help ?)
4) perhaps there’s some bios setting that would allow more efficient sharing of video memory ?
5) my favorite, perhaps there’s a better compression library that I could use to get decent quality screen capture with much less CPU usage.
I should also note that I have tried this with -threads 0, and the CPU usage hovers between 100% and 200% ; around 100% when the screen is static, and rising as I move windows around and otherwise create more output.
6) the motherboard claims to have some kind of hardware video encoder built into it. I haven’t paid this any attention to this point, as I assumed it was for the purpose of taking HDMI input and encoding it, but maybe there’s a way to use this, if so, what libraries might I need to get ffmpeg to do this.
Edits :
- This is an off the shelf ffmpeg. I’m certainly willing to try building it myself if I have some idea what I should do different.
- The motherboard claims to have hardware encoders, but I’m struggling to find out what they are (seems like it’s an Intel chip called "UHD Graphics 605" but nothing I can find suggests ffmpeg can work with that)
-
command line right now has been (without audio) :
ffmpeg -video_size 1280x720 -f x11grab -i ${DISPLAY}+100,100 -vcodec libx264 -f alsa -i pulse -acodec ac3 -threads 0 ./video$(date +%F-%H-%M-%S).mp4
Log from a short recording session is :
ffmpeg version 3.4.6-0ubuntu0.18.04.1 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
libavutil 55. 78.100 / 55. 78.100
libavcodec 57.107.100 / 57.107.100
libavformat 57. 83.100 / 57. 83.100
libavdevice 57. 10.100 / 57. 10.100
libavfilter 6.107.100 / 6.107.100
libavresample 3. 7. 0 / 3. 7. 0
libswscale 4. 8.100 / 4. 8.100
libswresample 2. 9.100 / 2. 9.100
libpostproc 54. 7.100 / 54. 7.100
[x11grab @ 0x561a723e5ac0] Stream #0: not enough frames to estimate rate; consider increasing probesize
Input #0, x11grab, from ':0+100,100':
Duration: N/A, start: 1578693116.465807, bitrate: N/A
Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1280x720, 29.97 fps, 1000k tbr, 1000k tbn, 1000k tbc
Unknown decoder 'libx264'
simon@studio:~$ ffmpeg -video_size 1280x720 -f x11grab -i ${DISPLAY}+100,100 -vcodec libx264 -threads 0 ./video$(date +%F-%H-%M-%S).mp4
ffmpeg version 3.4.6-0ubuntu0.18.04.1 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
libavutil 55. 78.100 / 55. 78.100
libavcodec 57.107.100 / 57.107.100
libavformat 57. 83.100 / 57. 83.100
libavdevice 57. 10.100 / 57. 10.100
libavfilter 6.107.100 / 6.107.100
libavresample 3. 7. 0 / 3. 7. 0
libswscale 4. 8.100 / 4. 8.100
libswresample 2. 9.100 / 2. 9.100
libpostproc 54. 7.100 / 54. 7.100
[x11grab @ 0x558225bc29a0] Stream #0: not enough frames to estimate rate; consider increasing probesize
Input #0, x11grab, from ':0+100,100':
Duration: N/A, start: 1578693132.513351, bitrate: N/A
Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1280x720, 29.97 fps, 1000k tbr, 1000k tbn, 1000k tbc
Stream mapping:
Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0x558225bcd360] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
[libx264 @ 0x558225bcd360] profile High 4:4:4 Predictive, level 3.1, 4:4:4 8-bit
[libx264 @ 0x558225bcd360] 264 - core 152 r2854 e9a5903 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=4 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 './video2020-01-10-14-52-12.mp4':
Metadata:
encoder : Lavf57.83.100
Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv444p, 1280x720, q=-1--1, 29.97 fps, 30k tbn, 29.97 tbc
Metadata:
encoder : Lavc57.107.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Past duration 0.806847 too large 256kB time=00:00:00.43 bitrate=4835.3kbits/s dup=16 drop=0 speed=0.207x
frame= 371 fps= 29 q=-1.0 Lsize= 639kB time=00:00:12.27 bitrate= 426.6kbits/s dup=16 drop=14 speed=0.971x
video:634kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.813096%
[libx264 @ 0x558225bcd360] frame I:2 Avg QP:18.16 size:221502
[libx264 @ 0x558225bcd360] frame P:93 Avg QP:14.97 size: 2007
[libx264 @ 0x558225bcd360] frame B:276 Avg QP:20.13 size: 69
[libx264 @ 0x558225bcd360] consecutive B-frames: 0.8% 0.0% 0.0% 99.2%
[libx264 @ 0x558225bcd360] mb I I16..4: 44.6% 0.0% 55.4%
[libx264 @ 0x558225bcd360] mb P I16..4: 0.2% 0.0% 0.3% P16..4: 0.7% 0.1% 0.1% 0.0% 0.0% skip:98.5%
[libx264 @ 0x558225bcd360] mb B I16..4: 0.0% 0.0% 0.0% B16..8: 1.0% 0.0% 0.0% direct: 0.0% skip:99.0% L0:50.9% L1:49.0% BI: 0.1%
[libx264 @ 0x558225bcd360] coded y,u,v intra: 41.3% 37.5% 37.4% inter: 0.1% 0.0% 0.0%
[libx264 @ 0x558225bcd360] i16 v,h,dc,p: 58% 41% 1% 0%
[libx264 @ 0x558225bcd360] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 33% 30% 14% 2% 4% 4% 5% 3% 5%
[libx264 @ 0x558225bcd360] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x558225bcd360] ref P L0: 59.2% 8.8% 25.5% 6.5%
[libx264 @ 0x558225bcd360] ref B L0: 59.4% 39.0% 1.6%
[libx264 @ 0x558225bcd360] ref B L1: 96.5% 3.5%
[libx264 @ 0x558225bcd360] kb/s:419.29
Exiting normally, received signal 2.
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