Newest 'ffmpeg' Questions - Stack Overflow

Les articles publiés sur le site

• FFMPEG : convert a mp4 to mp3 using ffmpeg-android ndk

  8 avril 2013, par talhamalik22

  I want to convert a video file of mp4 format to audio file of mp3 format. It is simple through command line but i cannot find how can i convert it through jni. Not sure which library and which function to call. Any help regarding this issue would be much appreciated.

• Decoding realtime h264 stream using ffmpeg.Do I need to set zero-lantancy to ffmpeg.How to set it

  8 avril 2013, par penghao

  I write something like realtime video conference application. I use x264 library to encode a realtime video data, Then I put the data to another end throughout the network. I want to decode the realtime h264 stream using ffmpeg library.

  When I encode, I know a lot of thing need to set,like --rc-lookahead 0 --sync-lookahead 0. But on the another end of decoding, I don't know whether the same thing need to set. And how to set these option to the real decoder in ffmpeg.

  Thanks in advance.

• add timestamp using exiv [closed]

  7 avril 2013, par user2052665

  I need help with a problem. I have a video which I have to make a frame for every second of it, for that I use the command: ffmpeg. The resulting images have no timestamp and I need to add.

  First question: There is the possibility of the ffmpeg command already taking images with the timestamp of when they were in the movie?

  Second question: If not possible, how to exiv2 (or other tool) I can add that value?

• ffmpeg : progressive to interlaced

  7 avril 2013, par user732274

  I have a progressive 50FPS video (made deinterlacing an interlaced 25FPS video using YADIF): is there a way to bring it back to its original format (25FPS, interlaced)? I know there's tinterlace, but it doesn't seem to work (the output frame rate is still 50FPS, no matter what value I use for this filter).

• ffmpeg/ffprobe show_frames option

  7 avril 2013, par user1526912

  I recently installed ffmpeg version 0.8.5-4:0.8.5 on my Ubuntu Linux box.

  When I execute "ffprobe -show_frames http://test.com/test.mp4" I get the following error:

  Unrecognized option 'show_frames'

  I have tried installed all sorts of ffmpeg dependent packages to fix this without any success.

  Can someone help to resolve this error by telling me what I need to install exactly to fix this?

  Thanks