Newest 'ffmpeg' Questions - Stack Overflow

Les articles publiés sur le site

• Compile ffmpeg for linux with mp3

  17 septembre 2011, par user916350

  I need compiled executable ffmpeg for my web-service on php. I downloaded source from author's site, and created executable file, but this file doesn't consist mp3 library (I need it). I read that I need download library from repository, but I think that I can't do that on hosting. Why can I create executable file with mp3 codec for easy copying ffmpeg on server?

• Compressed SWF format not supported/cws2fws issue

  16 septembre 2011, par CodedMonkey

  I am trying to convert .swf to a .flv file using ffmpeg. When I got that error, I searched around and found that I should use cws2fws to somehow decompress the .swf file so that it can be converted by ffmpeg. However, apparently I need to compile the cws2fws.c myself, but it requires so many other libs and files and none of them are located on any 1 site. Is there a precompiled version of cws2fws available somewhere for download, or can I solved my initial error some other way?

• What are all codecs supported by FFmepg ?

  16 septembre 2011, par poobalan

  I need a list of codecs supported by FFmpeg. Where can I find it? Thanks in advance.

• error while writing ffmpeg command for changing bit rate of mp4 file

  16 septembre 2011, par user946829

  I am using ffmpeg commands to change audio bit rate and video bit rate of one .mp4 file while creating one new .mp4 file. I am wirting the command as:---

  ffmpeg -i oldFile.mp4 -vcodec libx264 -ab 128 -b 700 newFile.mp4

  here: oldFile.mp4 == old file, whose audio bit rate and video bit rate i want to change. But I am getting this error:

  "encoder 'aac' is experimental and might produce bad results. Add '-strict experimental' if you want to use it."... Now kindly tell me if u know that what should be the correct command for this requirement. waiting for reply.

  ---

  Thanks for your advise. now I am writing this command as:--

  ffmpeg -i oldFile.mp4 -vcodec libx264 -ab 128k -b 700k newFile.mp4

  but this time I am getting error as:- "Too many bits per frame requested"

  But the same command is working if I am trying to change the bit rate of an older avi file while making a new avi file.

  can you please tell me what is the cause of error... your help is appreciable.

  waiting for reply.

• How do I set the first and last frame of a video to be an image ?

  16 septembre 2011, par user205865

  HTML 5 implementations are different across various browsers. In firefox, the image specified by the placeholder attribute will be shown until the user clicks play on the video. In chrome, the placeholder image is shown until the video is loaded (not played), at which point the first frame of the video is shown.

  To reconcile this issue, I would like to set the first frame of the video to the placeholder image so that the experience will be the same in both browsers.

  I would preferably do this using ffmpeg or mencoder. I have very limited experience using these however, so if someone could point me in the right direction, I would be much obliged.

  Thanks!