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• Streaming mp4a to localhost using udp and ffmpeg

  2 août 2017, par noswoscar

  I am using the following command to stream a video and it’s audio to localhost :
  ffmpeg -re -i out.mp4 -map 0:0 -vcodec libx264 -f h264 udp ://127.0.0.1:1234 -map 0:1 -acodec libfaac -f mp4a udp ://127.0.0.1:2020

  FFmpeg is not recognising my audio codec and my audio format so I get the following error message :
  Error

  What audio format and codec do I need to use ? The codec information of the video I wish to send is as follows :
  Codecs used

  When I convert the audio track to mp3 I can run the above command and stream the video and audio properly. However I dont want to convert all my video audio-tracks to mp3.

  (I am confused by all the encoders, decoders, codec names in the ffmpeg documentation) Is there a way of finding the right encoder to use with the mp4a audio codec other than reading the whole list of codecs and options ?

  Thanks.

• FFmpeg can't convert MOD to MP4

  7 août 2021, par Kaelan

  I'm trying to convert a MOD file to MP4, but it's not working. here is the command
  ffmpeg -y -i "Nintendo DSi + Internet.mod" "Nintendo DSi + Internet.mp4"

  And here is the log that it gives me
  

  


  ffmpeg version git-2020-02-13-6d37ca8 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9.2.1 (GCC) 20200122
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
  libavutil      56. 41.100 / 56. 41.100
  libavcodec     58. 68.102 / 58. 68.102
  libavformat    58. 38.100 / 58. 38.100
  libavdevice    58.  9.103 / 58.  9.103
  libavfilter     7. 75.100 /  7. 75.100
  libswscale      5.  6.100 /  5.  6.100
  libswresample   3.  6.100 /  3.  6.100
  libpostproc    55.  6.100 / 55.  6.100
[mpeg @ 000002557deb95c0] Format mpeg detected only with low score of 25, misdetection possible!
[mp2 @ 000002557debb280] Header missing
    Last message repeated 18 times
[mpeg @ 000002557deb95c0] probed stream 1 failed
[mpeg @ 000002557deb95c0] probed stream 2 failed
[mp2 @ 000002557e395600] Header missing
    Last message repeated 59 times
[mp2 @ 000002557debb280] Header missing
[mp2 @ 000002557e395600] Header missing
[mpeg @ 000002557deb95c0] decoding for stream 0 failed
[mpeg @ 000002557deb95c0] decoding for stream 3 failed
[mpeg @ 000002557deb95c0] start time for stream 2 is not set in estimate_timings_from_pts
[mpeg @ 000002557deb95c0] stream 0 : no PTS found at end of file, duration not set
[mpeg @ 000002557deb95c0] stream 2 : no TS found at start of file, duration not set
[mpeg @ 000002557deb95c0] stream 3 : no PTS found at end of file, duration not set
[mpeg @ 000002557deb95c0] Could not find codec parameters for stream 0 (Audio: mp2, 0 channels, s16p): unspecified frame size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[mpeg @ 000002557deb95c0] Could not find codec parameters for stream 1 (Video: none, none): unknown codec
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[mpeg @ 000002557deb95c0] Could not find codec parameters for stream 2 (Video: none, none): unknown codec
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[mpeg @ 000002557deb95c0] Could not find codec parameters for stream 3 (Audio: mp2, 0 channels, s16p): unspecified frame size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, mpeg, from 'Nintendo DSi + Internet.mod':
  Duration: 02:14:02.94, start: 15898.332444, bitrate: 6 kb/s
    Stream #0:0[0x1c8]: Audio: mp2, 0 channels, s16p
    Stream #0:1[0x1ea]: Video: none, none, 90k tbr, 90k tbn
    Stream #0:2[0x1eb]: Video: none, none, 90k tbr, 90k tbn
    Stream #0:3[0x1d9]: Audio: mp2, 0 channels, s16p
Stream mapping:
  Stream #0:1 -> #0:0 (? (?) -> h264 (libx264))
  Stream #0:0 -> #0:1 (mp2 (native) -> aac (native))
Decoder (codec none) not found for input stream #0:1


  


  I got this mod file from the Nintendo DSi + Internet Video (by dumping it with godmode9i and getting the mod file using godmode9). Any help is appreciated.

  


• Nginx RTMP module to generate HLS

  28 novembre 2020, par Joe Lin

  I'm streaming an audio stream with opus codec from Kurento
via ffmpeg to nginx-rtmp-module. I'm using the below command to stream to nginx-rtmp :

  


  ffmpeg -protocol_whitelist file,udp,rtp  -i test-audio.sdp  
-c:a libopus  -f opus rtmp:///live/


  


  I see no error on the ffmpeg side. But there's no m3u8 file being generated. But I noticed the following in the nginx log :

  


  2020/11/23 23:19:31 [info] 95#0: *8 connect: app='live' args='' flashver='FMLE/3.0 (compatible; Lavf57.83' swf_url='' tc_url='rtmp://192.168.4.28:1935/live' page_url='' acodecs=0 vcodecs=0 object_encoding=0, client: 172.17.0.1, server: 0.0.0.0:1935


  


  Noticed the acodes=0. Does this mean that it doesn't like opus codec ?

  


  Below is my nginx.conf :

  


  rtmp {
    server {
        listen 1935;
        chunk_size 4096;
        application hopefm {
            live on;
            interleave on;

            hls on;
            hls_path /mnt/hls;
            hls_fragment 3;
            hls_playlist_length 60;
        }
    }
}


  


  Thanks for any help.