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• FFMPEG : Generate mastered m3u8 playlist

  22 octobre 2019, par Сергей Барахтенко

  Tell the command line for FFMPEG to generate a playlist of the following format :

  #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=380000,RESOLUTION=640x360,CODECS="mp4a.40.2,avc1.77.30",CLOSED-CAPTIONS=NONE
  
  https://myurl/media/manifest/[input_file_name]-360.m3u8
  
  #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1510000,RESOLUTION=1920x1080,CODECS="mp4a.40.2,avc1.77.30",CLOSED-CAPTIONS=NONE
  
  https://myurl/media/manifest/[input_file_name]-1080.m3u8
  
  #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=890000,RESOLUTION=1280x720,CODECS="mp4a.40.2,avc1.77.30",CLOSED-CAPTIONS=NONE
  
  https://myurl/media/manifest/[input_file_name]-720.m3u8
  
  #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=250000,RESOLUTION=320x180,CODECS="mp4a.40.2,avc1.77.30",CLOSED-CAPTIONS=NONE
  
  https://myurl/media/manifest/[input_file_name]-180.m3u8

  As you can see from the example, the file contains links to other m3u8 playlists, which are downloaded depending on the network bandwidth (BANDWIDTH parameter)

  An example of an internal m3u8 playlist (playlist [input_file_name]-360.m3u8)

  #EXTM3U
  
  #EXT-X-VERSION:3
  
  #EXT-X-PLAYLIST-TYPE:VOD
  
  #EXT-X-MEDIA-SEQUENCE:0
  
  #EXT-X-TARGETDURATION:4
  
  #EXTINF:4.000,
  
  https://myurl/media/conversion/[input_file_name]-360.mp4-1.ts
  
  #EXTINF:4.000,
  
  https://myurl/media/conversion/[input_file_name]-360.mp4-2.ts
  
  #EXTINF:4.000,
  
  https://myurl/media/conversion/[input_file_name]-360.mp4-3.ts
  
  #EXTINF:4.000,
  
  https://myurl/media/conversion/[input_file_name]-360.mp4-4.ts
  
  #EXTINF:4.000,
  
  https://myurl/media/conversion/[input_file_name]-360.mp4-5.ts
  
  #EXTINF:4.000,
  
  https://myurl/media/conversion/[input_file_name]-360.mp4-6.ts
  
  #EXTINF:4.000,
  
  https://myurl/media/conversion/[input_file_name]-360.mp4-7.ts
  
  #EXTINF:4.000,
  
  https://myurl/media/conversion/[input_file_name]-360.mp4-8.ts
  
  ...
  
  #EXT-X-ENDLIST

  As you can see from it, the source file was divided into 8 TS segments

• Can I direct ffmpeg to a folder to do work using SET PATH ?

  11 août 2017, par 3pointedit

  I have some "MXF-type" media (various media files in a containing folder) As long as I have cmd line set to the media folder it works but if I want to run from C : and point to the media directory using explicit SET PATH it won’t run ffmpeg. I don’t know why. What is wrong with the way I am expecting SET PATH to work ?

  C:\Users\MYNAME>SET PATH=%PATH%;"H:\2017\PeterMc\camb_LungDoctor_730_1403(1).vmf\" ffmpeg -enable_drefs 1 -use_absolute_path 0 -i camb_LungDoctor_730_1403(1).mov -map 0:v -map 0:a -write_tmcd 1 camb_LungDoctor_730_1403(1).mp4

  While the following example works you can see that cmd must be in the media folder path.

  H:\2017\Peter Mc\camb_LungDoctor_730_1403(1).vmf> ffmpeg -enable_drefs 1 -use_absolute_path 0 -i camb_LungDoctor_730_1403(1).mov -map 0:v -map 0:a -write_tmcd 1 camb_LungDoctor_730_1403(1).mp4

• RTSP tunneled HTTP, FFMPEG

  13 janvier 2016, par Jon Andersen

  I’m trying to stream from an Axis ip camera which uses RTSP over HTTP.
  I can get the normal RTSP stream to work, but I can’t find any information or documentation on how to actually set the tunneling mode for the stream. It is supported in the source code by setting the control_transport to RTSP_MODE_TUNNEL . My question is simple how do I do this with the following code ?

   int ret = avformat_open_input(&pFormatCtx, [@"rtsp://ip/axis-media/media.amp" UTF8String], NULL, NULL);

  I tried the following :

  pFormatCtx = avformat_alloc_context();
  
  pFormatCtx->priv_data = malloc(sizeof(RTSPState));
  
  RTSPState *rt = pFormatCtx->priv_data;
  
  rt->control_transport = RTSP_MODE_TUNNEL;
  
  int ret = avformat_open_input(&pFormatCtx, [@"rtsp://ip/axis-media/media.amp" UTF8String], NULL, NULL);

  But it simply ignores it for me (It still keeps using RTP). I tried this aswell

   int ret = avformat_open_input(&pFormatCtx, [@"rtsp://ip/axis-media/media.amp" UTF8String], NULL, NULL);
  
  RTSPState *rt = pFormatCtx->priv_data;
  
  rt->control_transport = RTSP_MODE_TUNNEL;

  How would I solve this ? I’m thinking it’s something really simple since the ENUM is there.

  Working solution is

  AVDictionary *opts = 0;
  
  int ret = av_dict_set(&opts, "rtsp_transport", "http", 0);
  
  
  
  
  
  ret = avformat_open_input(&pFormatCtx, [@"rtsp://ip:80/axis-media/media.amp" UTF8String], NULL, &opts);
  
  
  
  av_dict_free(&opts);