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• How to stream a wmv file as an mp4 file (convert on the fly) over HTTP using ffmpeg or something similar ?

  8 juin 2016, par Adam Tal

  I understand it’s not possible to use the tag to play a WMV file.

  I thought about the following solution :

  • Streaming a video means sending small chunks of frames and sound
  • Reading a wmv file in chunks is surely possible
  • An html video tag can receive chunks in an mp4/webm/ogg format and display it

  Can I read a WMV file as a Steam and convert in on the fly to output it as if it was an MP4 file ?

  Few points :

  • The technology is not really important. I just have a problem I need to solve.. I would prefer a solution in C# or node.js because those are environments I’m comfortable with but anything else will do.
  • I will be happy to stream the file from a different server as wmv and output it as mp4 but I’m also able to download the file completely to my server and stream it from the local hard drive.
  • The mp4 output is not a must. It can also be webm or ogg (just need the video tag to support it)

• Video/Audio file analysis - meta data, similar to MediaInfo

  23 mai 2016, par user3585420

  I usually use MediaInfo to look into my media files to see the duration of the video/audio tracks within the file. I believe MediaInfo looks at meta data of the file ( headers ) rather than the actual filestream, probably due to speed. I want a tool that actually goes through the file to work out the duration of the video/audio tracks within the media file, rather than just telling me what the headers tell me.

  The reason I need this is because I have an instance of a media file which is not reporting the correct audio track duration. Example : I have two files, an audio file and a video file, vid1.mxf and aud1.mxf, these are the same length. I ’stich’ these together using FFMPEG and because of storage failure/network issues the audio track in the resulting file is short, however it does not report as short within MediaInfo. When I listen to the file however it is clearly short, the network/storage device must have become inaccessible during the ’stitching’ toether. The audio and video input files are on different storage devices.

  I have in the past used the C# library https://github.com/naudio/NAudio which does this sort of this, however it only works with singular .wav files, and not files where there is a video inside the container too ( .mxf ).

  Thanks

• fate : Add test similar to ticket 1242

  7 mars 2016, par Michael Niedermayer

  fate : Add test similar to ticket 1242
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] tests/fate/demux.mak
  • [DH] tests/ref/fate/mkv-1242