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Revolution of Open-source and film making towards open film making
6 octobre 2011, par
Mis à jour : Juillet 2013
Langue : English
Type : Texte
Autres articles (58)
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Les autorisations surchargées par les plugins
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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 -
Support audio et vidéo HTML5
10 avril 2011MediaSPIP utilise les balises HTML5 video et audio pour la lecture de documents multimedia en profitant des dernières innovations du W3C supportées par les navigateurs modernes.
Pour les navigateurs plus anciens, le lecteur flash Flowplayer est utilisé.
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Ces technologies permettent de distribuer vidéo et son à la fois sur des ordinateurs conventionnels (...)
Sur d’autres sites (11235)
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FFMpeg concat streams
26 mars 2016, par chourizoI am trying to receive two H264 UDP streams from two cameras, and save them to one file (so they are always synchronized). I tried a lot of things, but it always says that there is no video on the second stream (although I can watch it).
ffmpeg -probesize 20M -analyzeduration 20M -i udp://@127.0.0.1:1234 -probesize 20M -analyzeduration 20M -i udp://@127.0.0.1:1235 -filter_complex "[0:v]fps=15,scale=320:240,setsar=1/1,setpts=PTS-STARTPTS[v0]; [1:v]fps=15,scale=320:240,setsar=1/1,setpts=PTS-STARTPTS[v1]; [v0][v1]concat=n=2:v=1:a=0 [v0] [v1]" -map "[v0]" -map "[v1]" -threads 0 -y kk.ts
Is it possible to apply the concat to real time streams, so we have a video with two programs as a result ?
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FFMpeg concat streams
9 juillet 2017, par chourizoI am trying to receive two H264 UDP streams from two cameras, and save them to one file (so they are always synchronized). I tried a lot of things, but it always says that there is no video on the second stream (although I can watch it).
ffmpeg -probesize 20M -analyzeduration 20M -i udp://@127.0.0.1:1234 -probesize 20M -analyzeduration 20M -i udp://@127.0.0.1:1235 -filter_complex "[0:v]fps=15,scale=320:240,setsar=1/1,setpts=PTS-STARTPTS[v0]; [1:v]fps=15,scale=320:240,setsar=1/1,setpts=PTS-STARTPTS[v1]; [v0][v1]concat=n=2:v=1:a=0 [v0] [v1]" -map "[v0]" -map "[v1]" -threads 0 -y kk.ts
Is it possible to apply the concat to real time streams, so we have a video with two programs as a result ?
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ffmpeg acts weird at reencoding my videos
6 novembre 2022, par averagei have download multiple videos from yt-dlp (option :


yt-dlp --no-flat-playlist --audio-quality 0 --embed-thumbnail --embed-metadata --write-thumbnail --embed-subs --sub-langs all --embed-chapters --playlist-items xx playlist_url_goes_here



result in a bunch of video which encode in mkv and thumbnail in png (after preprocessing from webp/jpg)


my goal was to actually remove the embed thumbnail in mkv and replace it with png.


example of my video data when still in mkv format :


Input #0, matroska,webm, from 'ANIMACIÓN | kirby vs marx [U4g0vusRpEA].mkv':
 Metadata:
 title : ANIMACIÓN | kirby vs marx
 PURL : https://www.youtube.com/watch?v=U4g0vusRpEA
 COMMENT : https://www.youtube.com/watch?v=U4g0vusRpEA
 ARTIST : Los 5 heroes
 DATE : 20200908
 DESCRIPTION : kirby tendrá que enfrentarse a marx luego de que se negara a buscarle comida cuando marx estaba hambriento. Esto ocasiona que marx intente comer todo lo comestible que ve. ¿Podrá kirby detener a marx?
 SYNOPSIS : kirby tendrá que enfrentarse a marx luego de que se negara a buscarle comida cuando marx estaba hambriento. Esto ocasiona que marx intente comer todo lo comestible que ve. ¿Podrá kirby detener a marx?
 ENCODER : Lavf59.27.100
 Duration: 00:09:12.62, start: -0.007000, bitrate: 746 kb/s
 Stream #0:0(eng): Video: vp9 (Profile 0), yuv420p(tv, bt709), 1920x1080, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 1k tbn (default)
 Metadata:
 DURATION : 00:09:12.621000000
 Stream #0:1(eng): Audio: opus, 48000 Hz, stereo, fltp (default)
 Metadata:
 DURATION : 00:09:12.621000000
 Stream #0:2(eng): Subtitle: webvtt
 Metadata:
 title : English
 HANDLER_NAME : English
 DURATION : 00:08:29.168000000
 Stream #0:3: Attachment: none
 Metadata:
 filename : cover.webp
 mimetype : image/webp



(depend on the video it will be have subtitle or chapters)


i went to ffmpeg and bulk-convert them using the command


for f in *.mkv; do 
ffmpeg -i "$f" -i "${f%.*}.png" -threads 2 -movflags use_metadata_tags -map_chapters 0 -map 0:V -map 0:a -map 0:s? -map 0:d? -scodec mov_text -map 1 -c:v:1 png -disposition:v:1 attached_pic "${f%.*}.mp4"; 
done



but when i tried to run it for the video above,


- 

- during ffmpeg convertion the input was likely same to my expectation




Output #0, mp4, to 'ANIMACIÓN | kirby vs marx [U4g0vusRpEA].mp4':
 Metadata:
 title : ANIMACIÓN | kirby vs marx
 PURL : https://www.youtube.com/watch?v=U4g0vusRpEA
 COMMENT : https://www.youtube.com/watch?v=U4g0vusRpEA
 ARTIST : Los 5 heroes
 DATE : 20200908
 DESCRIPTION : kirby tendrá que enfrentarse a marx luego de que se negara a buscarle comida cuando marx estaba hambriento. Esto ocasiona que marx intente comer todo lo comestible que ve. ¿Podrá kirby detener a marx?
 SYNOPSIS : kirby tendrá que enfrentarse a marx luego de que se negara a buscarle comida cuando marx estaba hambriento. Esto ocasiona que marx intente comer todo lo comestible que ve. ¿Podrá kirby detener a marx?
 encoder : Lavf59.27.100
 Stream #0:0(eng): Video: h264 (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 25 fps, 12800 tbn (default)
 Metadata:
 DURATION : 00:09:12.621000000
 encoder : Lavc59.37.100 libx264
 Side data:
 cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
 Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
 Metadata:
 DURATION : 00:09:12.621000000
 encoder : Lavc59.37.100 aac
 Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874)
 Metadata:
 title : English
 HANDLER_NAME : English
 DURATION : 00:08:29.168000000
 encoder : Lavc59.37.100 mov_text
 Stream #0:3: Video: png (mp4v / 0x7634706D), rgb24(pc, progressive), 480x360, q=2-31, 200 kb/s, 25 fps, 12800 tbn (attached pic)
 Metadata:
 encoder : Lavc59.37.100 png



- 

- but when i use ffmpeg to check it again result in missing metadatas in video-audio-subtitles streams
(ffmpeg also add its custom metadata in which is not good) and the output video did not have the new thumbnail i want to embed (or even old thumbnail in webp)




Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'ANIMACIÓN | kirby vs marx [U4g0vusRpEA].mp4':
 Metadata:
 major_brand : isom
 minor_version : 512
 compatible_brands: isomiso2avc1mp41
 title : ANIMACIÓN | kirby vs marx
 PURL : https://www.youtube.com/watch?v=U4g0vusRpEA
 COMMENT : https://www.youtube.com/watch?v=U4g0vusRpEA
 ARTIST : Los 5 heroes
 DATE : 20200908
 DESCRIPTION : kirby tendrá que enfrentarse a marx luego de que se negara a buscarle comida cuando marx estaba hambriento. Esto ocasiona que marx intente comer todo lo comestible que ve. ¿Podrá kirby detener a marx?
 SYNOPSIS : kirby tendrá que enfrentarse a marx luego de que se negara a buscarle comida cuando marx estaba hambriento. Esto ocasiona que marx intente comer todo lo comestible que ve. ¿Podrá kirby detener a marx?
 encoder : Lavf59.27.100
 Duration: 00:09:12.64, start: 0.000000, bitrate: 1261 kb/s
 Stream #0:0[0x1](eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 1138 kb/s, 25 fps, 25 tbr, 12800 tbn (default)
 Metadata:
 handler_name : VideoHandler
 vendor_id : [0][0][0][0]
 encoder : Lavc59.37.100 libx264
 Stream #0:1[0x2](eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 116 kb/s (default)
 Metadata:
 handler_name : SoundHandler
 vendor_id : [0][0][0][0]
 Stream #0:2[0x3](eng): Subtitle: mov_text (tx3g / 0x67337874), 0 kb/s (default)
 Metadata:
 handler_name : English



so what i have gone wrong with my code and how to fix it ?
.