Recherche avancée

Sur d’autres sites (14468)

• Pipe input GIF to FFmpeg error, does it have size limit ?

  3 février 2020, par SerKo

  I am trying to pipe input a GIF file to FFmpeg and get output from it. And I get an error when I input a GIF file size bigger than 1MB (maybe even smaller, didn’t try).

  I am running on Debian GNU/Linux 10 (buster) and install FFmpeg by apt-get install ffmpeg.

  What’s problem ?

  After reading the FFmpeg pipe document and I have try execute command below :
  cat big_size.gif | ffmpeg -i pipe:0 -f gif output.gif

  And it shows error :
  pipe:: Input/output error

  What have I tried to fix ?

  If I input the GIF file directly the FFmpeg instead of using pipe input, I can output the GIF successfully.
  ffmpeg -i big_size.gif -f gif output.gif

  I was think of system pipe size limit, but I can pipe the GIF by using cat to cat and save successfully.
  cat big_size.gif | cat > output.gif

  So I don’t think the system pipe size limit cause the problem.

  Sample GIF

  Or you may try other GIF file size bigger then 1MB.

  

• Pipe ffmpeg output as mjpeg on multicast port ?

  17 janvier 2020, par xor31four

  I am trying to open a h.264 encoded stream from an IP camera, re-encode and stream it to a multicast address on my local subnet.

  Found a post that seems to describe what I’d like to achieve but I am running into several issues.

  I am using this command :

  ffmpeg -re -i rtsp://192.168.0.11/stream1.sdp mpegts udp://239.168.0.1:11000

  and I am receiving this output :

  [h264 @ 000001531da0ad40] SPS unavailable in decode_picture_timing
  
  [h264 @ 000001531da0ad40] non-existing PPS 0 referenced
  
  [h264 @ 000001531da0ad40] SPS unavailable in decode_picture_timing
  
  [h264 @ 000001531da0ad40] non-existing PPS 0 referenced
  
  [h264 @ 000001531da0ad40] decode_slice_header error
  
  [h264 @ 000001531da0ad40] no frame!
  
  [rtsp @ 000001531d9b9700] max delay reached. need to consume packet
  
  -- Above is repeated dozens of times
  
  [rtsp @ 000001531d9b9700] RTP: missed 8 packets
  
  [rtsp @ 000001531d9b9700] Could not find codec parameters for stream 1 (Unknown: none (meta / 0x6174656D)): unknown codec
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  [rtsp @ 000001531d9b9700] Could not find codec parameters for stream 2 (Unknown: none (bdat / 0x74616462)): unknown codec
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  Input #0, rtsp, from 'rtsp://192.168.0.11/stream1.sdp':
  
    Metadata:
  
      title           : DTC
  
      comment         : Pagos
  
    Duration: N/A, start: 1557.106222, bitrate: N/A
  
    Program 1
  
      Metadata:
  
        service_name    : Service #1
  
        service_provider: DTC
  
      Stream #0:0: Video: h264 (High) (vid1 / 0x31646976), yuv420p(progressive), 960x540 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
  
      Stream #0:1: Unknown: none (meta / 0x6174656D)
  
      Stream #0:2: Unknown: none (bdat / 0x74616462)
  
    No Program
  
      Stream #0:3: Data: epg
  
  [NULL @ 000001531e5aa940] Unable to find a suitable output format for 'mpegts'
  
  mpegts: Invalid argument

  Where am I going wrong ? I am quite inexperienced in this field but determined to learn more.

  Thank you in advance for any pointers on how to go about this..

• how can I pipe gstreamer output to ffmpeg [closed]

  11 décembre 2019, par alex jef

  how can I pipe GStreamer output to FFmpeg ?
  I have already tried some, none of them are working, e.g :

  gst-launch-1.0 -e -v  videotestsrc  ! video/x-raw, width=1920, height=1080, framerate=5/1, format=NV12  ! filesink location=/dev/stdout  | ffmpeg -i pipe:0 ao.avi
  
  ffmpeg version 2.8.15-0ubuntu0.16.04.1 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
  
    configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
  
    libavutil      54. 31.100 / 54. 31.100
  
    libavcodec     56. 60.100 / 56. 60.100
  
    libavformat    56. 40.101 / 56. 40.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 40.101 /  5. 40.101
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  2.101 /  1.  2.101
  
    libpostproc    53.  3.100 / 53.  3.100
  
  pipe:0: Invalid data found when processing input

  any help would be appreciated.