Recherche avancée
Médias (1)
-
Rennes Emotion Map 2010-11
19 octobre 2011, par
Mis à jour : Juillet 2013
Langue : français
Type : Texte
Autres articles (100)
-
Les vidéos
21 avril 2011, parComme les documents de type "audio", Mediaspip affiche dans la mesure du possible les vidéos grâce à la balise html5 .
Un des inconvénients de cette balise est qu’elle n’est pas reconnue correctement par certains navigateurs (Internet Explorer pour ne pas le nommer) et que chaque navigateur ne gère en natif que certains formats de vidéos.
Son avantage principal quant à lui est de bénéficier de la prise en charge native de vidéos dans les navigateur et donc de se passer de l’utilisation de Flash et (...) -
Amélioration de la version de base
13 septembre 2013Jolie sélection multiple
Le plugin Chosen permet d’améliorer l’ergonomie des champs de sélection multiple. Voir les deux images suivantes pour comparer.
Il suffit pour cela d’activer le plugin Chosen (Configuration générale du site > Gestion des plugins), puis de configurer le plugin (Les squelettes > Chosen) en activant l’utilisation de Chosen dans le site public et en spécifiant les éléments de formulaires à améliorer, par exemple select[multiple] pour les listes à sélection multiple (...) -
Participer à sa traduction
10 avril 2011Vous pouvez nous aider à améliorer les locutions utilisées dans le logiciel ou à traduire celui-ci dans n’importe qu’elle nouvelle langue permettant sa diffusion à de nouvelles communautés linguistiques.
Pour ce faire, on utilise l’interface de traduction de SPIP où l’ensemble des modules de langue de MediaSPIP sont à disposition. ll vous suffit de vous inscrire sur la liste de discussion des traducteurs pour demander plus d’informations.
Actuellement MediaSPIP n’est disponible qu’en français et (...)
Sur d’autres sites (7345)
-
How to convert png images to a HEVC(h265) video with alpha
20 décembre 2022, par ImWHI want to convert a sequence of png images to a HEVC video with alpha, I would like to use ffmpeg to do this work and find the following command(images name are p01.png, p02.png...) :


ffmpeg -framerate 10 -i p%02d.png -c:v hevc_videotoolbox -require_sw 1 -allow_sw 1 -alpha_quality 0.5 -vtag hvc1 hevc.mov


the print is here :


ffmpeg version 5.1.2 Copyright (c) 2000-2022 the FFmpeg developers
 built with Apple clang version 14.0.0 (clang-1400.0.29.202)
 configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/5.1.2_1 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox --enable-neon
 libavutil 57. 28.100 / 57. 28.100
 libavcodec 59. 37.100 / 59. 37.100
 libavformat 59. 27.100 / 59. 27.100
 libavdevice 59. 7.100 / 59. 7.100
 libavfilter 8. 44.100 / 8. 44.100
 libswscale 6. 7.100 / 6. 7.100
 libswresample 4. 7.100 / 4. 7.100
 libpostproc 56. 6.100 / 56. 6.100
Input #0, image2, from 'p%02d.png':
 Duration: 00:00:09.60, start: 0.000000, bitrate: N/A
 Stream #0:0: Video: png, rgba(pc), 375x812 [SAR 3779:3779 DAR 375:812], 10 fps, 10 tbr, 10 tbn
Stream mapping:
 Stream #0:0 -> #0:0 (png (native) -> hevc (hevc_videotoolbox))
Press [q] to stop, [?] for help
[1] 16348 trace trap ffmpeg -framerate 10 -i p%02d.png -c:v hevc_videotoolbox -require_sw 1 1 0.


It seems like there is no error and the video has been generated but the size of video is always
0kb, I try to change the parameter for command but nothing changed, so is there something working with the command ? or Is there is a simple way to create the HEVC video using png image ? Thanks

My Environment :
Apple silicon(MacBook with M1 Pro clip) Mac OS 13.0
ffmpeg : 5.1.2


-
How do I get an InputStream out of a Mono ?
30 octobre 2022, par EinfariBear with my noobness, I am learning web-flux. I had this simple application that takes a video and extract the audio using FFprobe and FFmpeg, so I thought of redoing it reactively, but I am failing miserably...


Controller :


@PostMapping("/upload")
public String upload(@RequestPart("file") Mono<filepart> filePartMono, final Model model) {
 Flux<string> filenameList = mediaComponent.extractAudio(filePartMono);
 model.addAttribute("filenameList", new ReactiveDataDriverContextVariable(filenameList));
 return "download";
}
</string></filepart>

Function to get audio streams out of the video :


public Mono<ffproberesult> getAudioStreams(InputStream inputStream) {
 try {
 return Mono.just(FFprobe.atPath(FFprobePath)
 .setShowStreams(true)
 .setSelectStreams(StreamType.AUDIO)
 .setLogLevel(LogLevel.INFO)
 .setInput(inputStream)
 .execute());
 } catch (JaffreeException e) {
 log.error(e.getMessage(), e);
 throw new MediaException("Audio formats could not be identified.");
 }
}
</ffproberesult>

Attempt 1 :


public Flux<string> extractAudio(Mono<filepart> filePartMono) {
 filePartMono.flatMapMany(Part::content)
 .map(dataBuffer -> dataBuffer.asInputStream(true))
 .flatMap(this::getAudioStreams)
 .subscribe(System.out::println);
 ...
}
</filepart></string>

Attempt 2 :


public Flux<string> extractAudio(Mono<filepart> filePartMono) {
 filePartMono.flatMapMany(Part::content)
 .reduce(InputStream.nullInputStream(), (inputStream, dataBuffer) -> new SequenceInputStream(
 inputStream, dataBuffer.asInputStream()
 ))
 .flatMap(this::getAudioStreams)
 .subscribe(System.out::println);
 ...
}
</filepart></string>

Attempt 3 :


public Flux<string> extractAudio(Mono<filepart> filePartMono) {
 DataBufferUtils.write(filePartMono.flatMapMany(Part::content), OutputStream.nullOutputStream())
 .map(dataBuffer -> dataBuffer.asInputStream(true))
 .flatMap(this::getAudioStreams)
 .subscribe(System.out::println);
 ...
}
</filepart></string>

Attempt 1 and 3 seems to be the same in the end, FFprobe complains as follows :


2022-10-30 11:24:30.292 WARN 79049 --- [ StdErr] c.g.k.jaffree.process.BaseStdReader : [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f9162702340] [warning] STSZ atom truncated
2022-10-30 11:24:30.292 ERROR 79049 --- [ StdErr] c.g.k.jaffree.process.BaseStdReader : [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f9162702340] [error] stream 0, contradictionary STSC and STCO
2022-10-30 11:24:30.292 ERROR 79049 --- [ StdErr] c.g.k.jaffree.process.BaseStdReader : [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f9162702340] [error] error reading header
2022-10-30 11:24:30.294 ERROR 79049 --- [ StdErr] c.g.k.jaffree.process.BaseStdReader : [error] tcp://127.0.0.1:51532: Invalid data found when processing input
2022-10-30 11:24:30.295 INFO 79049 --- [oundedElastic-3] c.g.k.jaffree.process.ProcessHandler : Process has finished with status: 1
2022-10-30 11:24:30.409 ERROR 79049 --- [oundedElastic-3] c.e.s.application.MediaComponent : Process execution has ended with non-zero status: 1. Check logs for detailed error message.


Attempt 2 produces multiple of these :


Exception in thread "Runnable-0" java.lang.StackOverflowError
 at java.base/java.io.SequenceInputStream.read(SequenceInputStream.java:198)


Could anybody point me in the right direction ? What am I doing wrong ? By the way, I am outputting to console just to see a result, but in the end I need to take all the outputted streams and pass them as arguments to another function that will finally extract the audio, so I need to figure out that as well.


Thank you in advance.


-
Can't get CBR when converting MP4 to Mono MP3
28 octobre 2022, par GDPHaving read at least a dozen other answers, it seems that the
b:a 96kparameter should be producing a MP3 with a constant bitrate (CBR), yet I can only get Variable bitrates.

The latest variation of ffmpeg that comes closest is below. I don't believe I'm missing anything, so are the other values interfering ?


UPDATE : replace input/output with the latest results.


From MediaInfo :


General
Complete name : C:\3024.mp3
Format : MPEG Audio
File size : 124 MiB
Duration : 2 h 59 min
Overall bit rate mode : Variable
Overall bit rate : 96.0 kb/s
Track name : My Title
Writing library : LAME3.100
major_brand : mp42
minor_version : 0
compatible_brands : mp42mp41

Audio
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 3
Duration : 2 h 59 min
Bit rate mode : Variable
Bit rate : 96.0 kb/s
Channel(s) : 1 channel
Sampling rate : 44.1 kHz
Frame rate : 38.281 FPS (1152 SPF)
Compression mode : Lossy
Stream size : 124 MiB (100%)
Writing library : LAME3.100


ffmpeg -i 3024.mp4 -metadata title="My Title" -vn -ar 44100 -ac 1 -b:a 96k 3024.mp3

ffmpeg version 4.1.1 Copyright (c) 2000-2019 the FFmpeg developers
 built with gcc 8.2.1 (GCC) 20190212
 configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth
 libavutil 56. 22.100 / 56. 22.100
 libavcodec 58. 35.100 / 58. 35.100
 libavformat 58. 20.100 / 58. 20.100
 libavdevice 58. 5.100 / 58. 5.100
 libavfilter 7. 40.101 / 7. 40.101
 libswscale 5. 3.100 / 5. 3.100
 libswresample 3. 3.100 / 3. 3.100
 libpostproc 55. 3.100 / 55. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '20221011_regular_3024.mp4':
 Metadata:
 major_brand : mp42
 minor_version : 0
 compatible_brands: mp42mp41
 creation_time : 2022-10-12T06:53:10.000000Z
 Duration: 02:59:59.36, start: 0.000000, bitrate: 1297 kb/s
 Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], 1198 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 60k tbc (default)
 Metadata:
 creation_time : 2022-10-12T06:53:10.000000Z
 handler_name : ?Mainconcept Video Media Handler
 encoder : AVC Coding
 Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 93 kb/s (default)
 Metadata:
 creation_time : 2022-10-12T06:53:11.000000Z
 handler_name : #Mainconcept MP4 Sound Media Handler
Stream mapping:
 Stream #0:1 -> #0:0 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
Output #0, mp3, to '20221011_regular_3024.mp3':
 Metadata:
 major_brand : mp42
 minor_version : 0
 compatible_brands: mp42mp41
 TIT2 : Regular Meeting on Tuesday, October 11th, 2022
 TSSE : Lavf58.20.100
 Stream #0:0(eng): Audio: mp3 (libmp3lame), 44100 Hz, mono, fltp, 96 kb/s (default)
 Metadata:
 creation_time : 2022-10-12T06:53:11.000000Z
 handler_name : #Mainconcept MP4 Sound Media Handler
 encoder : Lavc58.35.100 libmp3lame
size= 126556kB time=02:59:59.36 bitrate= 96.0kbits/s speed= 126x
video:0kB audio:126555kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000393% ```


Syndiquer tout le site
