The VideoLAN Forums

Posted: **17 Nov 2014 11:36**

Hello.

I have a strange problem:

I convert mp4 source file using command

/Applications/VLC.app/Contents/MacOS/VLC -I dummy /home/uznick/H264_test5_voice_mp4_480x360.mp4 vlc://quit --sout "#transcode{vb=5000,ab=160,vcodec=h264,height=1080,channels=2,width=1920,samplerate=48000,acodec=aac}:std{access=file{no-overwrite},mux=mp4,dst='/home/uznick/test.mp4'}"  --sout-avcodec-strict=-2 -vvv

And when I try to convert it to flv using avconv:

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avconv -y -loglevel error -i /home/uznick/test.mp4 -codec copy /home/uznick/test.mp4.flv

I get an error:

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[h264 @ 0x7fdd8a819a00] A non-intra slice in an IDR NAL unit.
[h264 @ 0x7fdd8a819a00] decode_slice_header error

When I just use ffprobe to check the file, I get the same error too:

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ffprobe /home/uznick/test.mp4
ffprobe version 2.4.3 Copyright (c) 2007-2014 the FFmpeg developers
  built on Nov  7 2014 18:39:07 with Apple LLVM version 6.0 (clang-600.0.54) (based on LLVM 3.5svn)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/2.4.3 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --enable-vda --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid
  libavutil      54.  7.100 / 54.  7.100
  libavcodec     56.  1.100 / 56.  1.100
  libavformat    56.  4.101 / 56.  4.101
  libavdevice    56.  0.100 / 56.  0.100
  libavfilter     5.  1.100 /  5.  1.100
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale      3.  0.100 /  3.  0.100
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  0.100 / 53.  0.100
[h264 @ 0x7ffd73807e00] A non-intra slice in an IDR NAL unit.
[h264 @ 0x7ffd73807e00] decode_slice_header error
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/uznick/test.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 0
    compatible_brands: mp41avc1qt
    creation_time   : 2014-11-17 09:15:03
    encoder         : vlc 2.1.5 stream output
    encoder-eng     : vlc 2.1.5 stream output
  Duration: 00:00:04.83, start: 0.000000, bitrate: 1759 kb/s
    Stream #0:0(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 126 kb/s (default)
    Metadata:
      creation_time   : 2014-11-17 09:15:03
      handler_name    : SoundHandler
    Stream #0:1(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 640x360 [SAR 57:128 DAR 19:24], 1663 kb/s, 30 fps, 30 tbr, 1000k tbn, 60 tbc (default)
    Metadata:
      creation_time   : 2014-11-17 09:15:03
      handler_name    : VideoHandler

What is the problem? Am I missing any parameters to pass to cvlc transcode?

The VideoLAN Forums

decode_slice_header error in mp4, converted via CVLC

decode_slice_header error in mp4, converted via CVLC