Newest 'ffmpeg' Questions - Stack Overflow

Les articles publiés sur le site

• Android, Share library dependency

  2 février 2012, par NadavRub
  1. I am Implementing an application that is using LibAv/ffmpeg on Android
  2. I am using JNI to interact with the Native code
  3. my 'Shared Lib' is using libswscale.so, libavutil.so, libavformat.so, libavdevice.so, libavcore.so and libavcodec.so.
  4. All the 'Shared Libs' are verified to be packed to the same directory on the APK file
  5. I am debugging on the device ( no emulator )
  6. Runtime.loadLibrary($MY_LIB_NAME) trigger an UnsatisfiedLinkError exception
  7. Directly running 'System.loadLibrary("swscale")' also cause an UnsatisfiedLinkError exception

  My guess is that libav*.so is dependent on additional libs that should be added to the APK, however, I am not sure how to detect these. Is there any tool to detect dependent Shared libraries? ( Window ddepends equivalent ) ?

  Any help will be appreciated.

  ~Nadav

• split the video in several part using ffmpeg

  2 février 2012, par Himiko

  I want to write a small program with help of ffmpeg. I want to process a video by cut the video into several parts, left part, right part...etc. How can I do it using ffmpeg? By the way, are there any documentation explain the API of the ffmpeg?

• Centos Video Optimizer

  2 février 2012, par Arjun Neras

  I have a lot of MP4 files on my server. And my aim is to get them to stream on android mobiles.

  The resolution of the videos are at 480×272 and this is not a problem because I tested it and most androids are able to stream it. But the problem is the size of the video. The streaming is slow and it buffers a lot because of its size.

  I need a converter that can decrease the size to around 50-60MB. With only a little decrease in quality. If possible, the output file should overwrite the input file.

  Can you think of any way I can do this work in minimum time? My server is CENTOS and I have FFMPEG, MP4Box installed.

• How to hack ffmpeg to consider I-Frames as key frames ?

  2 février 2012, par justanothercoder

  I'm trying to get ffmpeg to seek h264 interlaced videos, and i found that i can seek to any frame if i just force it.

  I already hacked the decoder to consider I - Frames as keyframes, and it works nicely with the videos i need it to work with. And there will NEVER be any videos encoded with different encoders.

  However, i'd like the seek to find me an I - Frame and not just any frame.

  What i'd need to do is to hack The AVIndexEntry creation so that it marks any frame that is an I-Frame to be a key frame. Or alternatively, hack the search thing to return I - Frames.

  The code does get a tad dfficult to follow at this point.

  Can someone please point me at the correct place in ffmpeg code which handles this?

• Facebook video upload [closed]

  2 février 2012, par Ahmet Kapıkıran

  I can't add subtitle to an avi file with mencoder. The length of avi videos are about 100 minutes. I split the videos to 19 minutes parts with ffmpeg and x264 codec and then I upload the video to user's facebook account with my facebook application. So, facebook starts to encode the video but after a period of time the video suddenly is removed by facebook. What is the problem. Is there a time period limit to send video to facebook profile or is my problem about codecs?