Newest 'ffmpeg' Questions - Stack Overflow

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• Convert video file to TIFF with ffmpeg.dll or avcodec.dll ? Is "on-the-fly" possible ?

  27 octobre 2011, par Berschi

  I want to create a program, which gets a video-file from Qt, converts that video file to TIFF-files and sends them to an algorithm which handles these TIFF-Files.
  My questions:

  • is it possible with ffmpeg or avcodec not to convert a video-file to TIFF-files first on harddrive and send them to the algorithm after that, but to convert frame for frame and send it to the algorithm right away?
  • The more important question: Is it possible to do that not with an external process with ffmpeg.exe, but with ffmpeg.dll? Or is it only possible with avcodec.dll? (It doesn't have to be "on-the-fly" like at my point above) How can I create a ffmpeg.dll with header and lib?

• How can I turn libavformat error messages off

  27 octobre 2011, par amrhassan

  By default, libavformat writes error messages to stderr, Like:

  Estimating duration from bitrate, this may be inaccurate

  How can I turn it off? or better yet, pipe it to my own neat logging function?

  Edit: Redirecting stderr to somewhere else is not acceptable since I need it for other logging purposes, I just want libavformat to not write to it.

• ffmpeg, lampp and phpvideotoolkit sequence ? ubuntu 11.10 desktop

  27 octobre 2011, par Toby

  Hello i am very new to owning a server and all. but im up for it.

  so what i want is ultimately to let a youtube clone cms run on my 'home-server' i know i need ffmpeg, ffmpeg-php lampp and phpvideotoolkit(optional) but what is the most effecient way to installing all these packages?

  and could you give me the commands for them? i also heard it is possible to download all these from synaptic package manager? what packages should i be getting then? I already tried this 4 times and ended up in screwing up my ubuntu resulting in formatting it 4 times...

  again i am really noob in this but if you could help me that would be so freeking awesome! (running ubuntu 11.10 desktop)

• Getting file info with ffmpeg, object file recognized as Audio ?

  27 octobre 2011, par cpl

  I'm testing a C++ program that should iterate in a directory and find all multimedia files. I used an iteration routine, and for every file I tried using the libav functions to open the file, such as av_find_stream_info in order to find stream info. It works fine for multimedia files, such as video and images, but the problem is that it recognizes some files as audio or video, for example it sees an audio stream inside a .o file! I also tried to use av_read_frame and it worked fine, without errors! I would like to avoid filtering by extension, is there any other solution to find "playable" files?

  Thanks

• setting timestamps for audio samples in directshow graph

  27 octobre 2011, par Aviad Rozenhek

  I am developing a directshow audio decoder filter, to decode AC3 audio. the filter is used in a live graph, decoding TS multicast. the demuxer (mainconcept) provides me with the audio data demuxed, but does not provide timestamps for the sample.

  how can I get/compute the correct timestamp of the audio?