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Sur d’autres sites (8363)

  • ffmpeg unable to get duration/bitrate of remote gif

    17 février, par Peter Xia

    I'm trying to get the duration of a gif.

    


    The command ffmpeg -i https://cdn.7tv.app/emote/01F6MZGCNG000255K4X1K7NTHR/4x.gif

    


    gives
Duration: N/A, start: 0.000000, bitrate: N/A

    


    However if i download the file and pass it in
ffmpeg -i 4x.gif

    


    it gives :
Duration: 00:00:07.92, start: 0.000000, bitrate: 1225 kb/s

    


    The issue seems limited only to gifs on 7tv site.

    


      

    • It works for other sites. (example : ffmpeg -i https://c.tenor.com/ULCY5B996-oAAAAd/tenor.gif).

      • 


    • It also works for other encodings of that image (exmaple ffmpeg -i https://cdn.7tv.app/emote/01F6MZGCNG000255K4X1K7NTHR/4x.avif)

      • 


    


    Here is the HTTP response header from 7tv site of that gif :

    


    HTTP/2 200 
content-type: image/gif
content-length: 1213725
x-7tv-cache-hits: 37527
x-7tv-cache: hit
age: 228365
cache-control: public, max-age=604800, s-maxage=86400, immutable
alt-svc: h3=":443"; ma=2592000
x-7tv-cdn-pod: cdn-ssprq
x-7tv-cdn-node: cdn-1
server: SevenTV
vary: origin, access-control-request-method, access-control-request-headers
access-control-allow-origin: *
access-control-expose-headers: *
date: Sun, 16 Feb 2025 20:47:28 GMT


    


    Can someone help me understand ? Something spcecific to this site is causing ffmpeg to behave differently ?

    


  • HlS playlist skip files with ffmpeg

    29 janvier, par tamirg

    I simply downloaded 5 mp3 files from here :
https://samplelib.com/sample-mp3.html

    


    which means i have :

    


    sample-3s.mp3
sample-6s.mp3
sample-9s.mp3
sample-12s.mp3
sample-15s.mp3


    


    and then i create a simple hls playlist sample.m3u8 :

    


    #EXTM3U
#EXT-X-TARGETDURATION:20
#EXT-X-MEDIA-SEQUENCE:0
#EXTINF:3.0,
sample-3s.mp3
#EXTINF:6.0,
sample-6s.mp3
#EXTINF:9.0,
sample-9s.mp3
#EXTINF:12.0,
sample-12s.mp3
#EXTINF:15.0,
sample-15s.mp3


    


    But when i play this playlist :

    


    ffplay sample.m3u8


    


    i get :

    


    [hls @ 0x13703b4d0] Opening 'sample-9s.mp3' for reading
[mp3 @ 0x13703b740] invalid concatenated file detected - using bitrate for duration
Input #0, hls, from 'playlist2.m3u8':
  Duration: N/A, start: 0.000000, bitrate: 128 kb/s
  Program 0
    Metadata:
      variant_bitrate : 0
  Stream #0:0: Audio: mp3 (mp3float), 44100 Hz, stereo, fltp, 128 kb/s
      Metadata:
        variant_bitrate : 0
        encoder         : Lavc57.10
2025-01-29 10:57:46.957 ffplay[17029:696588] +[IMKClient subclass]: chose IMKClient_Modern
2025-01-29 10:57:46.957 ffplay[17029:696588] +[IMKInputSession subclass]: chose IMKInputSession_Modern
[hls @ 0x13703b4d0] Opening 'sample-12s.mp3' for reading 0B
[mp3float @ 0x13703c710] Header missingvq=    0KB sq=    0B
[hls @ 0x13703b4d0] Opening 'sample-15s.mp3' for reading 0B


    


    It starts playing from the file sample-9s, and not sample-3s. So it skips the first two files.
Why does it happen ?

    


  • HLS playback stopped with Player error : mediaError - bufferAppendError

    23 janvier, par Sumoanand

    I am trying to merge two videos together in the m3u8 manifest file.
However, exactly at the point to HLS stream discontinuity, video playback stops with following error :
Player error : mediaError - bufferAppendError

    


    Here is the sample m3u8 snippet :

    


    #EXT-X-PROGRAM-DATE-TIME:2025-01-23T01:23:10.200-06:00
#EXTINF:6.000
17.ts
#EXT-X-PROGRAM-DATE-TIME:2025-01-23T01:23:16.200-06:00
#EXTINF:6.000
18.ts
#EXT-X-DISCONTINUITY
#EXT-X-KEY:METHOD=NONE
#EXT-X-PROGRAM-DATE-TIME:2025-01-23T01:23:21.700-06:00
#EXTINF:6.000
10ak171685189367-007cb1c1a5398250e495vHD.20.ts
#EXT-X-PROGRAM-DATE-TIME:2025-01-23T01:23:27.700-06:00
#EXTINF:6.000
10ak171685189367-007cb1c1a5398250e495vHD.21.ts


    


    FFprobe output of 18.ts :

    


      Duration: 00:00:06.01, start: 1692.774667, bitrate: 3440 kb/s
  Program 1 
  Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], 30 fps, 30 tbr, 90k tbn
  Stream #0:1[0x101]: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 159 kb/s


    


    FFprobe output of 10ak171685189367-007cb1c1a5398250e495vHD.20.ts :

    


      Duration: 00:00:06.02, start: 1.443444, bitrate: 744 kb/s
  Program 1 
    Metadata:
  Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], 30 fps, 30 tbr, 90k tbn
  Stream #0:1[0x101](eng): Audio: aac (LC) ([15][0][0][0] / 0x000F), 44100 Hz, stereo, fltp, 65 kb/s


    


    I would greatly appreciate any inputs.

    


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