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• AC3 decoding throws error number -16976906 ... vlc plays well

  23 décembre 2022, par user1940163

  I have got a mpeg ts file with following composition (shown by ffprobe)

  


  ffprobe version N-109444-geef763c705 Copyright (c) 2007-2022 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --enable-openssl
  libavutil      57. 43.100 / 57. 43.100
  libavcodec     59. 55.103 / 59. 55.103
  libavformat    59. 34.102 / 59. 34.102
  libavdevice    59.  8.101 / 59.  8.101
  libavfilter     8. 53.100 /  8. 53.100
  libswscale      6.  8.112 /  6.  8.112
  libswresample   4.  9.100 /  4.  9.100
[mpegts @ 0x56201c2c1cc0] Could not find codec parameters for stream 1 (Audio: ac3 ([129][0][0][0] / 0x0081), stereo, fltp): unspecified sample rate
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
Input #0, mpegts, from 'ff_vlc.ts':
  Duration: 00:10:00.02, start: 1.400000, bitrate: 1839 kb/s
  Program 1
    Metadata:
      service_name    : Service01
      service_provider: FFmpeg
  Stream #0:0[0x100]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(tv, bt709, progressive), 856x480 [SAR 320:321 DAR 16:9], 30 fps, 59.94 tbr, 90k tbn
  Stream #0:1[0x101](spa): Audio: ac3 ([129][0][0][0] / 0x0081), stereo, fltp


  


  ---

  


  I intend to transcode this so that I copy the video as it is but the audio will be encoded to aac ...so that I can play it in the browser.

  


  I use the following ffmpeg command to attempt that

  


  ffmpeg -i ff_vlc.ts -vcodec copy -acodec aac -map 0:v:0 -map 0:a:0 ff_vlc_2.ts


  


  this throws errors with -16976906 as follows..........( I have clipped the repetitive excessively long output)

  


  ffmpeg -i ff_vlc.ts -vcodec copy -acodec aac -map 0:v:0 -map 0:a:0 ff_vlc_2.ts
ffmpeg version N-109444-geef763c705 Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --enable-openssl
  libavutil      57. 43.100 / 57. 43.100
  libavcodec     59. 55.103 / 59. 55.103
  libavformat    59. 34.102 / 59. 34.102
  libavdevice    59.  8.101 / 59.  8.101
  libavfilter     8. 53.100 /  8. 53.100
  libswscale      6.  8.112 /  6.  8.112
  libswresample   4.  9.100 /  4.  9.100
[mpegts @ 0x55b4369b2440] Could not find codec parameters for stream 1 (Audio: ac3 ([129][0][0][0] / 0x0081), stereo, fltp): unspecified sample rate
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
Input #0, mpegts, from 'ff_vlc.ts':
  Duration: 00:10:00.02, start: 1.400000, bitrate: 1839 kb/s
  Program 1
    Metadata:
      service_name    : Service01
      service_provider: FFmpeg
  Stream #0:0[0x100]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(tv, bt709, progressive), 856x480 [SAR 320:321 DAR 16:9], 30 fps, 59.94 tbr, 90k tbn
  Stream #0:1[0x101](spa): Audio: ac3 ([129][0][0][0] / 0x0081), stereo, fltp
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (ac3 (native) -> aac (native))
Press [q] to stop, [?] for help
Error while decoding stream #0:1: Error number -16976906 occurred
    Last message repeated 17065 times
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
Error while decoding stream #0:1: Error number -16976906 occurred
    Last message repeated 2 times
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
Error while decoding stream #0:1: Error number -16976906 occurred
    Last message repeated 2 times
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
Error while decoding stream #0:1: Error number -16976906 occurred
    Last message repeated 2 times
....
....
....(repetitive output clipped and removed)
....
....
    Last message repeated 2 times
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
Error while decoding stream #0:1: Error number -16976906 occurred
    Last message repeated 2 times
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
Error while decoding stream #0:1: Error number -16976906 occurred
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
[abuffer @ 0x56289e5ab100] Value inf for parameter 'time_base' out of range [0 - 2.14748e+09]
    Last message repeated 1 times
[abuffer @ 0x56289e5ab100] Error setting option time_base to value 1/0.
[graph_0_in_0_1 @ 0x5628a3f5e800] Error applying options to the filter.
Error reinitializing filters!
Error while filtering: Numerical result out of range
Finishing stream 0:1 without any data written to it.
[abuffer @ 0x56289b2b89c0] Value inf for parameter 'time_base' out of range [0 - 2.14748e+09]
    Last message repeated 1 times
[abuffer @ 0x56289b2b89c0] Error setting option time_base to value 1/0.
[graph_0_in_0_1 @ 0x56289a63e780] Error applying options to the filter.
Error configuring filter graph
Conversion failed!


  


  ---

  


  I tried the above even with this command

  


  ffmpeg -analyzeduration 2147483647 -probesize 2147483647 -i ff_vlc.ts -vcodec copy -acodec aac -map 0:v:0 -map 0:a:0 ff_vlc_2.ts


  


  Still get the same errors. Only changed lines in the output are

  


  [mpegts @ 0x55e1b757d580] Failed to allocate buffers for seekback
[mpegts @ 0x55e1b757d580] Could not find codec parameters for stream 1 (Audio: ac3 ([129][0][0][0] / 0x0081), stereo, fltp): unspecified sample rate
Consider increasing the value for the 'analyzeduration' (2147483647) and 'probesize' (2147483647) options


  


  ---

  


  VLC player has no problems in playing this audio ... only ffmpeg cannot decode.

  


  How do I fix this ?

  


  Please help
Thanks

  


• Can MPMoviePlayerController play m3u8 file

  26 novembre 2013, par Nitesh

  I am trying to play a m3u8 file using MPMovieplayercontroller
  i pass the url to the MPMovieplayercontroller
  But it will not play. Is it possible ?

  I am converting flv,avi video file formats into m3u8 files using ffmpeg for live http streaming on my server.

  The m3u8 url works when i pass it to VLC as a network stream on my mac.
  I know this has been asked a number of times but i have not got any satisfactory answers.

  Regards
  Nitesh

• ffmpeg overlay video with audio

  2 août 2017, par ravindu1024

  I have two video files : input.mp4 (55seconds) and overlay.mp4 (10seconds). I need to overlay the overlay.mp4 on input.mp4 between 00:00:5 and 00:00:15 with both audio streams audible.
  I am using this command and everything seems to work ok but its causing a buffer overflow and causes the overlaid video to freeze and flicker. What am I doing wrong here ?

  ffmpeg -i input.mp4 -i overlay.mp4 -strict -2 -filter_complex
  
  "[0:v]setpts=PTS-STARTPTS[v0];
  
   [1:v]setpts=PTS-STARTPTS+5/TB[v1];
  
   [v0][v1]overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2:eof_action=pass[outv];
  
   [1:a]adelay=5000[a1];
  
   [0:a][a1] amix [outa]"
  
   -map [outv] -map [outa] out.mp4

  Log :

  Output #0, mp4, to 'out.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf56.40.101
  
      Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
  
      Metadata:
  
        encoder         : Lavc56.60.100 libx264
  
      Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 48000 Hz, stereo, fltp, 128 kb/s (default)
  
      Metadata:
  
        encoder         : Lavc56.60.100 aac
  
  Stream mapping:
  
    Stream #0:0 (h264) -> setpts
  
    Stream #0:1 (aac) -> amix:input0
  
    Stream #1:0 (h264) -> setpts
  
    Stream #1:1 (aac) -> adelay
  
    overlay -> Stream #0:0 (libx264)
  
    amix -> Stream #0:1 (aac)
  
  Press [q] to stop, [?] for help
  
  [Parsed_overlay_2 @ 0x169afe0] [framesync @ 0x169b128] Buffer queue overflow, dropping.
  
      Last message repeated 1 times
  
  [Parsed_overlay_2 @ 0x169afe0] [framesync @ 0x169b128] Buffer queue overflow, dropping.
  
      Last message repeated 13 times
  
  [Parsed_overlay_2 @ 0x169afe0] [framesync @ 0x169b128] Buffer queue overflow, dropping