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Médias (1)
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Video d’abeille en portrait
14 mai 2011, par
Mis à jour : Février 2012
Langue : français
Type : Video
Autres articles (97)
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Multilang : améliorer l’interface pour les blocs multilingues
18 février 2011, parMultilang est un plugin supplémentaire qui n’est pas activé par défaut lors de l’initialisation de MediaSPIP.
Après son activation, une préconfiguration est mise en place automatiquement par MediaSPIP init permettant à la nouvelle fonctionnalité d’être automatiquement opérationnelle. Il n’est donc pas obligatoire de passer par une étape de configuration pour cela. -
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 ;
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Dépôt de média et thèmes par FTP
31 mai 2013, parL’outil MédiaSPIP traite aussi les média transférés par la voie FTP. Si vous préférez déposer par cette voie, récupérez les identifiants d’accès vers votre site MédiaSPIP et utilisez votre client FTP favori.
Vous trouverez dès le départ les dossiers suivants dans votre espace FTP : config/ : dossier de configuration du site IMG/ : dossier des média déjà traités et en ligne sur le site local/ : répertoire cache du site web themes/ : les thèmes ou les feuilles de style personnalisées tmp/ : dossier de travail (...)
Sur d’autres sites (10412)
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How to mux *only* TTML subtitles into fmp4 file(s)
25 juin 2021, par ChrisAs of WWDC 2017, HLS on Apple devices has supported TTML (specifically IMSC1)


Subtitles are made available to me in a single XML file, which I wish to slice/package so that it can be distributed alongside the video assets, i.e. as
fmp4
fragments containing only the subtitle stream.

(slicing is not strictly required - correct muxing into a single file would be acceptable)


While it feels like something that
ffmpeg
ormp4box
should be capable of doing, documentation for correctly achieving that is proving elusive. Examples, including this one which would perform slicing and m3u8 generation, all assume subtitles are being added to a video asset, rather than packaged to be delivered in parallel.

Any attempt to approximate that, having removed video-specific options only results in errors :


ffmpeg -i subitles.ttml \
 -hls_time 60 \
 -hls_playlist_type vod \
 -hls_segment_type fmp4 \
 -hls_segment_filename "segment%d.m4s" \
 index.m3u8
 
subtitles.ttml: Invalid data found when processing input



Whether this is because the TTML is invalid (although I don't believe that's likely), or because FFmpeg is trying to read it as if it was video, I cannot say.


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ffmpeg export multichannel audio -map
8 avril 2014, par speedyrazorI am trying to export all audio channels from a multichannel quicktime file with ffmpeg which has the following audio configuration, but am unsure if the command below is correct. All the files look and play correct in Quicktime player except the L+R_Total.wav which refuses to play in Quicktime player but plays fine in VLC, so not sure if i'm using the wrong command :
Track 1 - mono
Track 2 - mono
Track 3 - mono
Track 4 - mono
Track 5 - mono
Track 6 - mono
Track 7 - stereoI am using :
/Users/me/Desktop/python/ffmpeg/ffmpeg -i /Users/me/Desktop/test.mov -acodec pcm_s24le -map 0:1 -y Left.wav -acodec pcm_s24le -map 0:2 Right.wav -acodec pcm_s24le -map 0:3 Center.wav -acodec pcm_s24le -map 0:4 LFE.wav -acodec pcm_s24le -map 0:5 Left_Surround.wav -acodec pcm_s24le -map 0:6 Right_Surround.wav -acodec pcm_s24le -map 0:7 Left+Right_Total.wav
Here is the printout from the terminal :
MacBook-Pro:~ me$ /Users/me/Desktop/python/ffmpeg/ffmpeg -i /Users/me/Desktop/test.mov -acodec pcm_s24le -map 0:1 -y Left.wav -acodec pcm_s24le -map 0:2 Right.wav -acodec pcm_s24le -map 0:3 Center.wav -acodec pcm_s24le -map 0:4 LFE.wav -acodec pcm_s24le -map 0:5 Left_Surround.wav -acodec pcm_s24le -map 0:6 Right_Surround.wav -acodec pcm_s24le -map 0:7 Left+Right_Total.wav
ffmpeg version 2.2 Copyright (c) 2000-2014 the FFmpeg developers
built on Mar 25 2014 15:00:55 with llvm-gcc 4.2.1 (LLVM build 2336.11.00)
configuration: --prefix=/Volumes/Ramdisk/sw --enable-gpl --enable-pthreads --enable-version3 --enable-libspeex --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-avfilter --enable-libopencore_amrwb --enable-libopencore_amrnb --enable-filters --enable-libgsm --arch=x86_64 --enable-runtime-cpudetect
libavutil 52. 66.100 / 52. 66.100
libavcodec 55. 52.102 / 55. 52.102
libavformat 55. 33.100 / 55. 33.100
libavdevice 55. 10.100 / 55. 10.100
libavfilter 4. 2.100 / 4. 2.100
libswscale 2. 5.102 / 2. 5.102
libswresample 0. 18.100 / 0. 18.100
libpostproc 52. 3.100 / 52. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/me/Desktop/test.mov':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
creation_time : 2014-03-06 11:25:34
Duration: 00:01:03.48, start: 0.000000, bitrate: 153967 kb/s
Stream #0:0(eng): Video: prores (apch / 0x68637061), yuv422p10le, 1920x1080, 144704 kb/s, SAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 23976 tbn, 23976 tbc (default)
Metadata:
creation_time : 2014-03-06 11:25:34
handler_name : Apple Alias Data Handler
timecode : 00:00:00:00
Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (FL), s32, 1152 kb/s (default)
Metadata:
creation_time : 2014-03-06 11:25:34
handler_name : Apple Alias Data Handler
Stream #0:2(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (FR), s32, 1152 kb/s (default)
Metadata:
creation_time : 2014-03-06 11:25:34
handler_name : Apple Alias Data Handler
Stream #0:3(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32, 1152 kb/s (default)
Metadata:
creation_time : 2014-03-06 11:25:34
handler_name : Apple Alias Data Handler
Stream #0:4(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (LFE), s32, 1152 kb/s (default)
Metadata:
creation_time : 2014-03-06 11:25:34
handler_name : Apple Alias Data Handler
Stream #0:5(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (BL), s32, 1152 kb/s (default)
Metadata:
creation_time : 2014-03-06 11:25:34
handler_name : Apple Alias Data Handler
Stream #0:6(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (BR), s32, 1152 kb/s (default)
Metadata:
creation_time : 2014-03-06 11:25:34
handler_name : Apple Alias Data Handler
Stream #0:7(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, downmix, s32, 2304 kb/s (default)
Metadata:
creation_time : 2014-03-06 11:25:34
handler_name : Apple Alias Data Handler
Stream #0:8(eng): Data: none (tmcd / 0x64636D74) (default)
Metadata:
creation_time : 2014-03-06 11:26:04
handler_name : Apple Alias Data Handler
timecode : 00:00:00:00
Output #0, wav, to 'Left.wav':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
ISFT : Lavf55.33.100
Stream #0:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, 1 channels (FL), s32, 1152 kb/s (default)
Metadata:
creation_time : 2014-03-06 11:25:34
handler_name : Apple Alias Data Handler
Output #1, wav, to 'Right.wav':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
ISFT : Lavf55.33.100
Stream #1:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, 1 channels (FR), s32, 1152 kb/s (default)
Metadata:
creation_time : 2014-03-06 11:25:34
handler_name : Apple Alias Data Handler
Output #2, wav, to 'Center.wav':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
ISFT : Lavf55.33.100
Stream #2:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, mono, s32, 1152 kb/s (default)
Metadata:
creation_time : 2014-03-06 11:25:34
handler_name : Apple Alias Data Handler
Output #3, wav, to 'LFE.wav':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
ISFT : Lavf55.33.100
Stream #3:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, 1 channels (LFE), s32, 1152 kb/s (default)
Metadata:
creation_time : 2014-03-06 11:25:34
handler_name : Apple Alias Data Handler
Output #4, wav, to 'Left_Surround.wav':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
ISFT : Lavf55.33.100
Stream #4:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, 1 channels (BL), s32, 1152 kb/s (default)
Metadata:
creation_time : 2014-03-06 11:25:34
handler_name : Apple Alias Data Handler
Output #5, wav, to 'Right_Surround.wav':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
ISFT : Lavf55.33.100
Stream #5:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, 1 channels (BR), s32, 1152 kb/s (default)
Metadata:
creation_time : 2014-03-06 11:25:34
handler_name : Apple Alias Data Handler
Output #6, wav, to 'Left+Right_Total.wav':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
ISFT : Lavf55.33.100
Stream #6:0(eng): Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, downmix, s32, 2304 kb/s (default)
Metadata:
creation_time : 2014-03-06 11:25:34
handler_name : Apple Alias Data Handler
Stream mapping:
Stream #0:1 -> #0:0 (pcm_s24le -> pcm_s24le)
Stream #0:2 -> #1:0 (pcm_s24le -> pcm_s24le)
Stream #0:3 -> #2:0 (pcm_s24le -> pcm_s24le)
Stream #0:4 -> #3:0 (pcm_s24le -> pcm_s24le)
Stream #0:5 -> #4:0 (pcm_s24le -> pcm_s24le)
Stream #0:6 -> #5:0 (pcm_s24le -> pcm_s24le)
Stream #0:7 -> #6:0 (pcm_s24le -> pcm_s24le)
Press [q] to stop, [?] for help
size= 8927kB time=00:01:03.48 bitrate=1152.0kbits/s
video:0kB audio:71415kB subtitle:0 data:0 global headers:0kB muxing overhead -87.499863% -
How to generate pcm audio file by setting 20 bit depth ?
6 juillet 2015, par vip007No option using ffmpeg
I am using ffmpeg to generate audio data. I am using following command
ffmpeg.exe -i in.wav -ar 44100 -acodec pcm_s16le -ac 1 out.wav
but there is no option to convert to 20 bit depth pcm audio. (something like pcm_s20le).
I want to perform some operations on apple codec (e.g. encoding pcm audio data to alac).
On ALAC source : http://alac.macosforge.org/trac/browser/trunk/ReadMe.txt , it has been mentioned like this ;
Apple Lossless supports the following features
1. Bit depths 16, 20, 24 and 32 bits.Media Foundation on windows throwing exception for 20 bit depth
I tried sample encoding and transcoding application mentioned on MSDN https://code.msdn.microsoft.com/windowsapps/media-transcode-sample-f7ba5269
with following configuration but it failed
spTypeOut->SetUINT32(MF_MT_AUDIO_BITS_PER_SAMPLE, 20);
NOTE : but i put 16 instead of 20 ; it created smoothly.
Is there any way to generate such 20 bit PCM audio ? What is so special about 20 bit depth that it is not being considered on ffmpeg and media foundation but on apple codec ?