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La conservation du net art au musée. Les stratégies à l’œuvre
26 mai 2011
Mis à jour : Juillet 2013
Langue : français
Type : Texte
Autres articles (87)
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Pour accéder à la personnalisation des champs de formulaires, il est nécessaire d’aller dans l’administration de votre MediaSPIP puis de sélectionner "Configuration des masques de formulaires".
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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.
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Sur d’autres sites (5852)
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Merging\Joining three FFMPEG Commands (Drawtext / -filter_complex overlay / anullsrc=channel_layout)
18 décembre 2020, par roarCurrently I am using three different commands to create three mp4s only to delete the two "temporary" videos using this code.


@ECHO OFF
ffmpeg -f lavfi -i color=size=1280x720:duration=5:rate=25:color=Black -vf "drawtext=fontfile='GothamRnd-Book.otf':line_spacing=15:fontsize=15:fontcolor=white:x=(w-text_w)/2:y=(h-text_h)/2:text=Stack Exchange" "out1.mp4"
ffmpeg -i "out1.mp4" -i logo.png -filter_complex "overlay=x=10:y=10" "out2.mp4"
ffmpeg -f lavfi -i anullsrc=channel_layout=stereo:sample_rate=48000 -i "out2.mp4" -c:v copy -c:a aac -shortest "out3.mp4"
del "out1.mp4"
del "out2.mp4"
pause



The nearest I have come is moving the
anullsrc=channel_layout
into the-filter_complex
but that results in a long encode that I dont really understand what it is going because if Ictrl-c
to cancel the batch still createsout3.mp4
correctly.

ffmpeg -f lavfi -i color=size=1280x720:duration=5:rate=25:color=Black -vf "drawtext=fontfile='GothamRnd-Book.otf':line_spacing=15:fontsize=15:fontcolor=white:x=(w-text_w)/2:y=(h-text_h)/2:text=Stack Exchange" "out1.mp4"
ffmpeg -f lavfi -i anullsrc=channel_layout=stereo:sample_rate=48000 -i "out1.mp4" -i logo.png -filter_complex "overlay=x=10:y=10" "out3.mp4"



It seems like this could be streamlined to not create the temporary files.
But maybe this is the only way to do this. Thank you for any assistance and sorry if the answer is obvious.


Rory


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ffmpeg missing blend filter
17 juin 2020, par user2927954I am working on android project using ffmpeg library. I followed instruction from : https://github.com/guardianproject/android-ffmpeg to build ffmpeg library for android. All are OK.



Now, i am testing filters that corresponding to video filter of this library such as : drawtext, scale, pad, ... Most of them worked fine, but i have problem with "blend" filter.



I try with commands : ffmpeg -i input1.mp4 -i input2.mp4 -filter_complex blend=all_expr='if(eq(mod(X,2),mod(Y,2)),A,B)' -y out.mp4 and recieve error : no such blend filter.



Do you know how i configure to enable this filter ?



Here is the output result :



ffmpeg version 0.11.1 Copyright (c) 2000-2012 the FFmpeg developers
 built on Feb 27 2014 05:23:20 with gcc 4.6 20120106 (prerelease)
 configuration: --arch=arm --cpu=cortex-a8 --target-os=linux --enable-runtime-cpudetect --prefix=/data/data/info.guardianproject.ffmpeg/app_opt --enable-pic --disable-shared --enable-static --cross-prefix=/home/admin/workspace/android-ndk-r9c/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/bin/arm-linux-androideabi- --sysroot=/home/admin/workspace/android-ndk-r9c/platforms/android-3/arch-arm --extra-cflags='-I../x264 -mfloat-abi=softfp -mfpu=neon' --extra-ldflags=-L../x264 --enable-version3 --enable-gpl --disable-doc --enable-yasm --enable-decoders --enable-encoders --enable-muxers --enable-demuxers --enable-parsers --enable-protocols --enable-filters --enable-avresample --enable-libfreetype --disable-indevs --enable-indev=lavfi --disable-outdevs --enable-hwaccels --enable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --disable-network --enable-libx264 --enable-zlib --enable-muxer=md5
 libavutil 51. 54.100 / 51. 54.100
 libavcodec 54. 23.100 / 54. 23.100
 libavformat 54. 6.100 / 54. 6.100
 libavdevice 54. 0.100 / 54. 0.100
 libavfilter 2. 77.100 / 2. 77.100
 libswscale 2. 1.100 / 2. 1.100
 libswresample 0. 15.100 / 0. 15.100
 libpostproc 52. 0.100 / 52. 0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/videokit/in.mp4':
 Metadata:
 major_brand : isom
 minor_version : 0
 compatible_brands: isom3gp4
 creation_time : 2014-03-04 08:53:01
 Duration: 00:00:15.10, start: 0.000000, bitrate: 7055 kb/s
 Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720, 6935 kb/s, SAR 65536:65536 DAR 16:9, 17.18 fps, 34.42 tbr, 90k tbn, 180k tbc
 Metadata:
 creation_time : 2014-03-04 08:53:01
 handler_name : VideoHandle
 Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 16000 Hz, stereo, s16, 128 kb/s
 Metadata:
 creation_time : 2014-03-04 08:53:01
 handler_name : SoundHandle
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/videokit/7.mp4':
 Metadata:
 major_brand : isom
 minor_version : 512
 compatible_brands: isomiso2mp41
 creation_time : 1970-01-01 00:00:00
 encoder : Lavf53.12.0
 comment : Courtesy of National Geographic. Used by Permission.
 Duration: 00:00:04.20, start: 0.000000, bitrate: 1601 kb/s
 Stream #1:0(und): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 320x240 [SAR 1:1 DAR 4:3], 1472 kb/s, 10 fps, 10 tbr, 10 tbn, 10 tbc
 Metadata:
 creation_time : 1970-01-01 00:00:00
 handler_name : VideoHandler
 Stream #1:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, s16, 128 kb/s
 Metadata:
 creation_time : 1970-01-01 00:00:00
 handler_name : SoundHandler
No such filter: 'blend'
Error configuring filters.




Thanks


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avcodec/options : deprecate avcodec_get_frame_class()
25 février 2021, par James Almeravcodec/options : deprecate avcodec_get_frame_class()
AVFrame hasn't been a struct defined in libavcodec for a decade now, when
it was moved to libavutil.Found-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by : James Almer <jamrial@gmail.com>