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Autres articles (67)
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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.
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Sur d’autres sites (8099)
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Some H264-mp4 videos can't be loaded by any non-Chromium based web browser
3 mai 2020, par LaizrodI regularly use ffmpeg to encode some videos, blu-ray etc in mp4 files (encoded in H264 and AAC) in order to be played on web browsers.
Chromium based browsers such as Google Chrome or the new Microsoft Edge can play all of my files flawlessly.
But today I noticed that some video files couldn't be loaded by some web browsers. It looks like they can't be loaded by any non-Chromium based web browser. (Safari, Firefox etc..)



So I decided to check out and compare the specs of files that work with any web browser, and files that doesn't work with non-Chromium based browsers.



There's what I got :



- 

- Playable by any web browser :





General
Complete name : /storage/100.mp4
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42 (isom/iso2/avc1/mp41)
File size : 624 MiB
Duration : 23 min 54 s
Overall bit rate : 3 648 kb/s
Encoded date : UTC 2019-10-02 22:15:27
Tagged date : UTC 2019-10-02 22:15:27
Writing application : HandBrake 1.2.2 2019022300

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4
Format settings : CABAC / 1 Ref Frames
Format settings, CABAC : Yes
Format settings, ReFrames : 1 frame
Format settings, GOP : M=3, N=24
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 23 min 54 s
Bit rate : 3 481 kb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 23.976 (24000/1001) FPS
Minimum frame rate : 23.974 FPS
Maximum frame rate : 23.981 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.070
Stream size : 595 MiB (95%)
Encoded date : UTC 2019-10-02 22:15:27
Tagged date : UTC 2019-10-02 22:15:27
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Codec configuration box : avcC

Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 23 min 54 s
Bit rate mode : Constant
Bit rate : 160 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 44.1 kHz
Frame rate : 43.066 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 27.4 MiB (4%)
Title : Stereo
Language : Japanese
Default : Yes
Alternate group : 1
Encoded date : UTC 2019-10-02 22:15:27
Tagged date : UTC 2019-10-02 22:15:27




- 

- Unplayable by non-chromium based web browsers :





General
Complete name : /storage/DL/test.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/iso2/avc1/mp41)
File size : 329 MiB
Duration : 23 min 52 s
Overall bit rate : 1 926 kb/s
Writing application : Lavf58.20.100

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4
Format settings : CABAC / 4 Ref Frames
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 23 min 52 s
Bit rate : 1 792 kb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 (24000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.036
Stream size : 306 MiB (93%)
Writing library : x264 core 155 r2917 0a84d98
Encoding settings : cabac=1 / ref=1 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=2 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=0 / threads=34 / lookahead_threads=8 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=1 / keyint=250 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc_lookahead=10 / rc=crf / mbtree=1 / crf=21.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Language : Japanese
Codec configuration box : avcC

Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 23 min 52 s
Bit rate mode : Constant
Bit rate : 128 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 21.9 MiB (7%)
Language : Japanese
Default : Yes
Alternate group : 1




My knowledge is limited and I'm unable to understand why and which differences are causing my issue.
Can someone identify the problem and help me fix it with ffmpeg ?



Thank you


-
My bot doesn't play any music when hosted on Heroku
25 août 2022, par Lucas SilvaI am creating a music command, working great locally but not on Heroku. I have the following buildpacks :



This is my code :


@commands.command(name="musga", help="coloque um url da musica que deseja reproduzir!")
async def play(self, ctx, arg):
 global vc
 
 try:
 voice_channel = ctx.author.voice.channel
 vc = await voice_channel.connect()
 except:
 print('[ERROR]') #debug

 if vc.is_playing():
 await ctx.send(f'{ctx.author.mention}, Já estou cantando.')

 else:
 with YoutubeDL(self.YDL_OPTIONS) as ydl:
 info = ydl.extract_info(arg, download=False)
 
 URL = info['formats'][0]['url']

 vc.play(discord.FFmpegPCMAudio(executable="ffmpeg", source = URL, **self.FFMPEG_OPTIONS))
 
 while vc.is_playing():
 await sleep(1)



And requirements.txt :


discord.py[voice]
PyNaCL
youtube_dl
ffmpeg



When using the command, my bot joins the channel but doesn't play the music and doesn't print any traceback.


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FFMpeg : audio resampling changes slightly the speed of the music [on hold]
24 octobre 2018, par thenaohIn my Android app, I use the FFMpeg library to extract audio samples from an audio file on the fly, and also resample them (since my file is encoded in 44100 Hz, and my device expects 48000 Hz sound).
The problem is : even if the sound quality is perfect, the speed is a little bit higher than the regular speed of the music.
The difference is very small (small enough so you won’t hear it), but you can hear it when you play the same song at the same time on a regular player (like VLC for example).
I think it comes from the resampling, but I don’t know how to fix it.
Here is my code (I get my samples thanks to the
getPcmFloat()
function) : https://gist.github.com/mregnauld/2538d98308ad57eb75cfcd36aab5099aHow can I correct the speed of the music ?
Thanks for your help.