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Autres articles (39)
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Personnaliser les catégories
21 juin 2013, parFormulaire de création d’une catégorie
Pour ceux qui connaissent bien SPIP, une catégorie peut être assimilée à une rubrique.
Dans le cas d’un document de type catégorie, les champs proposés par défaut sont : Texte
On peut modifier ce formulaire dans la partie :
Administration > Configuration des masques de formulaire.
Dans le cas d’un document de type média, les champs non affichés par défaut sont : Descriptif rapide
Par ailleurs, c’est dans cette partie configuration qu’on peut indiquer le (...) -
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 -
HTML5 audio and video support
13 avril 2011, parMediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
For older browsers the Flowplayer flash fallback is used.
MediaSPIP allows for media playback on major mobile platforms with the above (...)
Sur d’autres sites (9872)
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ffmpeg decoding MP4 to Open GL texture black screen
5 septembre 2019, par DakiaiuI decoded a MP4 video and want to display the AVFrame via glTexImage2D and glTexSubImage2D but all I get is a blank GL Window.
I’ve tried looking at the various examples in the ffmpeg github examples tree. https://github.com/FFmpeg/FFmpeg/tree/master/doc/examples and different posts from the past and recently on this site learning slowly from them but I could not find anything I am doing wrong.
while(av_read_frame(format_context,packet) >= 0){
if(packet->stream_index == video_stream_index){
av_frame = decode(codec_context,av_frame,packet);
sws_context = sws_getContext(codec_context->width,codec_context->height,codec_context->pix_fmt,codec_context->width,codec_context->height,
AV_PIX_FMT_RGB24, SWS_BICUBIC,nullptr,nullptr,nullptr);
sws_scale(sws_context,
av_frame->data,
av_frame->linesize,
0,
codec_context->height,
gl_frame->data,
gl_frame->linesize);
sws_freeContext(sws_context);
if(first_use == true) {
glTexImage2D(GL_TEXTURE_2D,
0,
GL_RGB,
codec_context->width,
codec_context->height,
0,
GL_RGB,
GL_UNSIGNED_BYTE,
gl_frame->data[0]);
first_use = false;
}else{
glTexSubImage2D(GL_TEXTURE_2D,
0,
0,
0,
codec_context->width,
codec_context->height,
GL_RGB,
GL_UNSIGNED_BYTE,
gl_frame->data[0]);
}
}
}
while( glfwGetKey(window, GLFW_KEY_ESCAPE ) != GLFW_PRESS &&
glfwWindowShouldClose(window) == 0 );
}The frames decode successfully but I cannot see anything. It has to be something with the above gl code that I have done wrong. I can show the ffmpeg code above if necessary.
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Remove black frames and sync audio with ffmpeg
24 janvier 2020, par rahim123I’m trying to figure out a way to automatically process .mp4 or .mkv videos that have been manually edited to remove a bunch of segments, leaving many blank spaces (black frames with no audio). I want to remove all but one black frame (although I would settle for removing all of them if it’s much simpler) and then also sync the audio after the video timings change.
I found this question and tried the three main suggestions :
ffmpeg -i in.mkv -vf mpdecimate,setpts=N/FRAME_RATE/TB out.mkvffmpeg -i in.mkv -vf [mpdecimate][] out.mkvffmpeg -i in.mkv -vf [decimate][]=cycle=6,[setpts][]=N/25/TB out.mkv
The first one does eliminate the black segments, but it doesn’t sync the audio. The other two commands don’t work :
> ffmpeg -i in.mp4 -vf [decimate][]=cycle=6,[setpts][]=N/25/TB out.mp4
ffmpeg version 4.2.1 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 9 (SUSE Linux)
configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --incdir=/usr/include/ffmpeg --extra-cflags='-O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection -Werror=return-type -flto=auto -g' --optflags='-O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection -Werror=return-type -flto=auto -g' --disable-htmlpages --enable-pic --disable-stripping --enable-shared --disable-static --enable-gpl --disable-openssl --enable-avresample --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcelt --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libdc1394 --enable-libdrm --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libssh --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libv4l2 --enable-libvpx --enable-libwebp --enable-libxml2 --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lto --enable-lv2 --enable-libmfx --enable-vaapi --enable-vdpau --enable-libfdk-aac-dlopen --enable-nonfree --enable-libvo-amrwbenc --enable-version3 --enable-libx264 --enable-libx265 --enable-librtmp --enable-libxvid
libavutil 56. 31.100 / 56. 31.100
libavcodec 58. 54.100 / 58. 54.100
libavformat 58. 29.100 / 58. 29.100
libavdevice 58. 8.100 / 58. 8.100
libavfilter 7. 57.100 / 7. 57.100
libavresample 4. 0. 0 / 4. 0. 0
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 'in.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.20.100
Duration: 00:34:23.62, start: 0.000000, bitrate: 506 kb/s
Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, smpte170m/unknown/smpte170m), 640x480 [SAR 1:1 DAR 4:3], 412 kb/s, 29.97 fps, 29.97 tbr, 1867500000.00 tbn, 59.94 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 86 kb/s (default)
Metadata:
handler_name : SoundHandler
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[AVFilterGraph @ 0x55ece8def080] Bad (empty?) label found in the following: "[]=cycle=6,[setpts][]=N/25/TB".
Error reinitializing filters!
Failed to inject frame into filter network: Invalid argument
Error while processing the decoded data for stream #0:0
[aac @ 0x55ece8c5be80] Qavg: 222.643
[aac @ 0x55ece8c5be80] 2 frames left in the queue on closing
Conversion failed!> ffmpeg -i in.mp4 -vf [decimate][]=cycle=6,[setpts][]=N/25/TB out.mp4
ffmpeg version 4.2.1 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 9 (SUSE Linux)
configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --incdir=/usr/include/ffmpeg --extra-cflags='-O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection -Werror=return-type -flto=auto -g' --optflags='-O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection -Werror=return-type -flto=auto -g' --disable-htmlpages --enable-pic --disable-stripping --enable-shared --disable-static --enable-gpl --disable-openssl --enable-avresample --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcelt --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libdc1394 --enable-libdrm --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libssh --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libv4l2 --enable-libvpx --enable-libwebp --enable-libxml2 --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lto --enable-lv2 --enable-libmfx --enable-vaapi --enable-vdpau --enable-libfdk-aac-dlopen --enable-nonfree --enable-libvo-amrwbenc --enable-version3 --enable-libx264 --enable-libx265 --enable-librtmp --enable-libxvid
libavutil 56. 31.100 / 56. 31.100
libavcodec 58. 54.100 / 58. 54.100
libavformat 58. 29.100 / 58. 29.100
libavdevice 58. 8.100 / 58. 8.100
libavfilter 7. 57.100 / 7. 57.100
libavresample 4. 0. 0 / 4. 0. 0
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 'in.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.20.100
Duration: 00:34:23.62, start: 0.000000, bitrate: 506 kb/s
Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, smpte170m/unknown/smpte170m), 640x480 [SAR 1:1 DAR 4:3], 412 kb/s, 29.97 fps, 29.97 tbr, 1867500000.00 tbn, 59.94 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 86 kb/s (default)
Metadata:
handler_name : SoundHandler
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[AVFilterGraph @ 0x558b0d48af80] Bad (empty?) label found in the following: "[]=cycle=6,[setpts][]=N/25/TB".
Error reinitializing filters!
Failed to inject frame into filter network: Invalid argument
Error while processing the decoded data for stream #0:0
[aac @ 0x558b0d2f7e80] Qavg: 222.643
[aac @ 0x558b0d2f7e80] 2 frames left in the queue on closing
Conversion failed!I also tried this script, but it also fails to sync the audio. I tried with both .mp4 and .mkv source files. Thanks for the help.
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ffmpeg adding 6 secs of black frames in the beginning of a file
7 août 2014, par user3842039Trying to convert a .mov file (h264 and pcm) generated in Mpegstreamclip (MacOS) and the result is strangely out of sync with around 6 seconds of black frames at the beginning. I have tried many differente audio and video codec and the result is the same even with a -vcodec copy and -acodec copy. Below the return of ffmpeg (git version compiled today - 06/08/2014) :
ffmpeg -i /media/dados/x/PGM-970.mov -vcodec copy -acodec copy /media/dados/convertidos/PGM-970-converted-ffmpeg-compilado.mov
ffmpeg version 2.3.git-1ace957 Copyright (c) 2000-2014 the FFmpeg developers
built on Jul 26 2014 20:25:06 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-x11grab --enable-libpulse --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr
libavutil 52. 92.101 / 52. 92.101
libavcodec 55. 69.100 / 55. 69.100
libavformat 55. 49.100 / 55. 49.100
libavdevice 55. 13.102 / 55. 13.102
libavfilter 4. 11.102 / 4. 11.102
libavresample 1. 3. 0 / 1. 3. 0
libswscale 2. 6.100 / 2. 6.100
libswresample 0. 19.100 / 0. 19.100
libpostproc 52. 3.100 / 52. 3.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x2ddac20] multiple edit list entries, a/v desync might occur, patch welcome
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x2ddac20] Concatenated H.264 or H.265 might not play correctly.
Guessed Channel Layout for Input Stream #0.1 : mono
Guessed Channel Layout for Input Stream #0.2 : mono
Guessed Channel Layout for Input Stream #0.3 : mono
Guessed Channel Layout for Input Stream #0.4 : mono
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/media/dados/x/PGM-970.mov':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
creation_time : 2014-08-01 16:50:24
Duration: 00:24:56.30, start: 0.000000, bitrate: 8350 kb/s
Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte1File '/media/dados/convertidos/PGM-970-converted-ffmpeg-compilado.mov' already exists. Overwrite ? [y/N] y
70m), 720x480, 5258 kb/s, 29.97 fps, 29.97 tbr, 2997 tbn, 5994 tbc (default)
Metadata:
creation_time : 2014-08-01 16:50:24
handler_name : Apple Alias Data Handler
encoder : H.264
timecode : 01:00:00;00
Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, 1 channels, s16, 768 kb/s (default)
Metadata:
creation_time : 2014-08-01 16:50:24
File '/media/dados/convertidos/PGM-970-converted-ffmpeg-compilado.mov' already exists. Overwrite ? [y/N] yhandler_name : Apple Alias Data Handler
Stream #0:2(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, 1 channels, s16, 768 kb/s (default)
Metadata:
creation_time : 2014-08-01 16:50:24
handler_name : Apple Alias Data Handler
Stream #0:3(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, 1 channels, s16, 768 kb/s (default)
Metadata:
creation_time : 2014-08-01 16:50:24
handler_name : Apple Alias Data Handler
Stream #0:4(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, 1 channels, s16, 768 kb/s (default)
Metadata:
creation_time : 2014-08-01 16:50:24
handler_name : Apple Alias Data Handler
Stream #0:5(eng): Data: none (tmcd / 0x64636D74) (default)
Metadata:
creation_time : 2014-08-01 16:51:16
handler_name : Apple Alias Data Handler
timecode : 01:00:00;00
Output #0, mov, to '/media/dados/convertidos/PGM-970-converted-ffmpeg-compilado.mov':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
encoder : Lavf55.49.100
Stream #0:0(eng): Video: h264 (avc1 / 0x31637661), yuv420p, 720x480, q=2-31, 5258 kb/s, 29.97 fps, 11988 tbn, 2997 tbc (default)
Metadata:
creation_time : 2014-08-01 16:50:24
handler_name : Apple Alias Data Handler
encoder : H.264
timecode : 01:00:00;00
Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, 768 kb/s (default)
Metadata:
creation_time : 2014-08-01 16:50:24
handler_name : Apple Alias Data Handler
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for helpEven ignoring the audio stream with "-an" ffmpeg persists to add the frames and alter the output duration.
Any help is very much appreciated ! thanks in advance
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