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• Errors in FFMPEG and AVCONV (error count , error y=31 x=16 , overread 8 )

  14 mai 2014, par Kotik_o

  I have a Dlink camera DCS-932L.

  I want to get video -> image.

  To do that I execute :

  avconv -i http://user:pass@[IP]/video.cgi?user=user&password=pass&channel=0&.mjpg "%d.jpeg" 

  A few times I get errors like :

  [mjpeg @ 0x18a1240] error y=31 x=16

  or

  error count : 64

  or

  overread 8

  there is a way to discard this errors ? If I have a bad image doesn’t matter. I want that avconv or ffmpeg continues with saving images...

  Thanks for your time.

• ffmpeg with multiple live inputs [closed]

  9 juin 2013, par maddanio

  we are trying to get ffmpeg to combine multiple live streams into one. In principle we got it to work by mosaicing the streams like so :

  ffmpeg -rtsp_transport tcp -r 25 -i rtsp ://root:password@192.168.178.91:554/axis-media/media.amp \
  -rtsp_transport tcp -r 25 -i rtsp ://root:password@192.168.178.92:554/axis-media/media.amp \
  -filter_complex "[0:0]pad=iw*2:ih[a] ;[a][1:0]overlay=w" ...

  the problem though is that ffmpeg seems to start the input streams at significantly different times, so that there is about a 1 second shift between the streams, that remains throughout. Now we do have correct time stamps (pts) on both streams. Can we somehow tell ffmpeg to respect those and use them to align the streams correctly ?

• FFMPEG Error VC1 to X264 (maybe decoding VC1)

  29 janvier 2013, par Xatian

  I am encountering the following error when transcoding using FFMPEG.
  It seams to me that it's an error decoding the VC1 format and has actually nothing to do with the target format (x264) I want to transcode.

  I tracked the error to this source-file :

  http://cekirdek.pardus.org.tr/ ismail/ffmpeg-docs/vc1_8c-source.html

  but I don't know how to set the profile to a value != simple.

  FFMPEG Output :

  ffmpeg version 1.1 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Jan 16 2013 22:52:43 with gcc 4.6.3 (Gentoo 4.6.3 p1.10, pie-0.5.2)
  
    configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --enable-shared --cc=x86_64-pc-linux-gnu-gcc --cxx=x86_64-pc-linux-gnu-g++ --ar=x86_64-pc-linux-gnu-ar --optflags='-O2 -march=native -pipe' --extra-cflags='-O2 -march=native -pipe' --extra-cxxflags='-O2 -march=native -pipe' --disable-static --enable-gpl --enable-postproc --enable-avfilter --disable-stripping --disable-debug --disable-doc --disable-network --disable-vaapi --disable-vdpau --disable-ffplay --disable-runtime-cpudetect --enable-libx264 --disable-indev=v4l2 --disable-indev=alsa --disable-indev=oss --disable-indev=jack --disable-outdev=alsa --disable-outdev=oss --disable-outdev=sdl --enable-libfreetype --disable-amd3dnow --disable-amd3dnowext --disable-altivec --disable-avx --disable-mmxext --disable-vis --disable-neon --cpu=host --enable-hardcoded-tables
  
    libavutil      52. 13.100 / 52. 13.100
  
    libavcodec     54. 86.100 / 54. 86.100
  
    libavformat    54. 59.106 / 54. 59.106
  
    libavdevice    54.  3.102 / 54.  3.102
  
    libavfilter     3. 32.100 /  3. 32.100
  
    libswscale      2.  1.103 /  2.  1.103
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  2.100 / 52.  2.100
  
  [NULL @ 0x1f99a90] LOOPFILTER shall not be enabled in Simple Profile
  
  [NULL @ 0x1f99a90] FASTUVMC unavailable in Simple Profile
  
  [NULL @ 0x1f99a90] Old interlaced mode is not supported
  
  [NULL @ 0x1f99a90] Old WMV3 version detected, some frames may be decoded incorrectly
  
  [NULL @ 0x1f99a90] Old interlaced mode is not supported
  
  [NULL @ 0x1f99a90] FASTUVMC unavailable in Simple Profile
  
  [NULL @ 0x1f99a90] LOOPFILTER shall not be enabled in Simple Profile
  
  [NULL @ 0x1f99a90] FASTUVMC unavailable in Simple Profile
  
  [NULL @ 0x1f99a90] LOOPFILTER shall not be enabled in Simple Profile
  
  [NULL @ 0x1f99a90] FASTUVMC unavailable in Simple Profile
  
  Last message repeated 1 times
  
  [NULL @ 0x1f99a90] LOOPFILTER shall not be enabled in Simple Profile
  
  [NULL @ 0x1f99a90] FASTUVMC unavailable in Simple Profile
  
  [NULL @ 0x1f99a90] LOOPFILTER shall not be enabled in Simple Profile
  
  [NULL @ 0x1f99a90] FASTUVMC unavailable in Simple Profile
  
  Last message repeated 1 times
  
  ======
  
  ---> This goes on forever ... skipped
  
  ======
  
  [NULL @ 0x1f99a90] FASTUVMC unavailable in Simple Profile
  
  [NULL @ 0x1f99a90] LOOPFILTER shall not be enabled in Simple Profile
  
  [NULL @ 0x1f99a90] FASTUVMC unavailable in Simple Profile
  
  [NULL @ 0x1f99a90] Chroma scaling is not supported, expect wrong picture
  
  [NULL @ 0x1f99a90] LOOPFILTER shall not be enabled in Simple Profile
  
  [NULL @ 0x1f99a90] FASTUVMC unavailable in Simple Profile
  
  [NULL @ 0x1f99a90] LOOPFILTER shall not be enabled in Simple Profile
  
  [NULL @ 0x1f99a90] FASTUVMC unavailable in Simple Profile
  
  [NULL @ 0x1f99a90] LOOPFILTER shall not be enabled in Simple Profile
  
  [vc1 @ 0x1f93760] max_analyze_duration 5000000 reached at 5000000
  
  [vc1 @ 0x1f93760] Could not find codec parameters for stream 0 (Video: vc1): unspecified size
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  [vc1 @ 0x1f93760] Estimating duration from bitrate, this may be inaccurate
  
  test.vc1: could not find codec parameters

  Here is the CMD-line i use ... xD
  Basically I stripped EVERYTHING (codec-related and quality-related) because the error happens no matter what I pass ...

  ffmpeg -i test.vc1 test.mkv