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• Getting (Estimated) Time Offset of the Errors Reported by ffmpeg

  22 mai 2024, par Haru

  I'm using ffmpeg to check for errors in video files, but while it reports tons of issues it doesn't tell me where exactly the error happens in the file. It just dumps some crazy long hex numbers (0x7fa…) which doesn't tell me anything. Is there a way to make it report some timestamps, or at least estimated timestamps, or byte-offsets into the stream ? I tried the -debug_ts flag, but nothing changed in the output.

  



  $ ffmpeg -debug_ts -v error -i a_broken_file.mp4 -f null -
[h264 @ 0x7fa513023400] Reference 4 >= 4
[h264 @ 0x7fa513023400] error while decoding MB 15 34, bytestream 1304
[h264 @ 0x7fa513023400] Frame num change from 36 to 72
[h264 @ 0x7fa513023400] decode_slice_header error
[h264 @ 0x7fa513023400] Invalid NAL unit size (-1989965076 > 2668).
[h264 @ 0x7fa513023400] Error splitting the input into NAL units.
[aac @ 0x7fa513007200] Prediction is not allowed in AAC-LC.
Error while decoding stream #0:1: Invalid data found when processing input
[aac @ 0x7fa513007200] channel element 3.8 is not allocated
Error while decoding stream #0:1: Invalid data found when processing input
[aac @ 0x7fa513007200] channel element 3.11 is not allocated
Error while decoding stream #0:1: Invalid data found when processing input
[aac @ 0x7fa513007200] channel element 2.10 is not allocated
Error while decoding stream #0:1: Invalid data found when processing input
[aac @ 0x7fa513007200] Inconsistent channel configuration.
[aac @ 0x7fa513007200] get_buffer() failed
Error while decoding stream #0:1: Invalid argument
[aac @ 0x7fa513007200] Inconsistent channel configuration.
[aac @ 0x7fa513007200] get_buffer() failed
Error while decoding stream #0:1: Invalid argument
[aac @ 0x7fa513007200] channel element 3.1 is not allocated
Error while decoding stream #0:1: Invalid data found when processing input
[aac @ 0x7fa513007200] Reserved bit set.
…


  



  Or perhaps I could extract this information from the hex numbers there (I haven't found a single information about what this number stands for) ?

  


• lavc : Move brd_scale to codec private options

  11 septembre 2015, par Vittorio Giovara

  lavc : Move brd_scale to codec private options
  This option is only used by mpegvideoenc,
  
  It is a very codec-specific option, so deprecate the global variant.
  
  Set proper limits to the maximum allowed values.
  Signed-off-by : Vittorio Giovara <vittorio.giovara@gmail.com>
  

  • [DBH] libavcodec/avcodec.h
  • [DBH] libavcodec/mpegvideo.h
  • [DBH] libavcodec/mpegvideo_enc.c
  • [DBH] libavcodec/options_table.h

• ffmpeg : Could not find codec parameters for stream 1 (Video : vp8, yuv420p) : unspecified size ?

  17 août 2024, par Thomas Carlton

  I have an RTP stream coming from Kurento Media Server.

  


  I would like to record this stream to a file using ffmpeg. I'm running the command

  


  ffmpeg -protocol_whitelist file,crypto,udp,rtp -i a.sdp -c:v libx264 -analyzeduration 100M -probesize 100M -y output.mp4


  


  The SDP File is :

  


  v=0
o=- 3831930560 3831930560 IN IP4 127.0.0.1
s=Kurento Media Server
c=IN IP4 127.0.0.1
t=0 0
m=audio 20000 RTP/AVPF 96 0 97
a=setup:actpass
a=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time
a=rtpmap:96 opus/48000/2
a=rtpmap:97 AMR/8000
a=rtcp:13001
a=sendrecv
a=mid:audio0
a=ssrc:2843019226 cname:user7547104516@host-14132be
m=video 20002 RTP/AVPF 102 103
a=setup:actpass
a=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time
a=rtpmap:102 VP8/90000
a=rtpmap:103 H264/90000
a=fmtp:103 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42e01f
a=rtcp:56917
a=sendrecv
a=mid:video0
a=rtcp-fb:102 nack
a=rtcp-fb:102 nack pli
a=rtcp-fb:102 goog-remb
a=rtcp-fb:102 ccm fir
a=rtcp-fb:103 nack
a=rtcp-fb:103 nack pli
a=rtcp-fb:103 ccm fir
a=ssrc:1320996934 cname:user7547104516@host-14132be


  


  ffmpeg starts recording however it records only audio. No video recorded and I'm having the error :

  


  


  Could not find codec parameters for stream 1 (Video : vp8, yuv420p) : unspecified size

  


  


  How can I solve that ?