Newest 'ffmpeg' Questions - Stack Overflow

Les articles publiés sur le site

• How to install ffmpeg in Xampp ?

  10 juin 2016, par Don Donllei

  How do I install ffmpeg on Xampp?

  I tried this but it did not work Install FFMPEG on XAMPP

  Use: PHP Version 5.6.15, Windows 10, 64bits

• SDL_AddTimer and threading, clearing timer queue

  10 juin 2016, par William Seemann

  I'm writing a media player based on FFmpeg and I have a design issue. My code calls a function to render video frames at irregular intervals using SDL's SDL_AddTimer function. My problem is this, if I want to perform garbage collection when one video ends (or playback is stopped) and another starts, how can I ensure that I have no more timers in the queue or in the middle of execution as to avoid accessing an object that suddenly has been freed.

• How to flush buffer data to disk when using FFmpeg to write a mp4 file ?

  9 juin 2016, par Sean

  I am using FFmpeg to write a mp4 file, I grab bitmap images from remote IP camera and encode it by h.264, the media container is mp4 file, no problem to generate the MP4 file if I only record several minutes, the problem is FFmpeg never flushs buffer data to disk when I call method "av_interleaved_write_frame"(all encoded data in memory, never free them), only when I call method "avio_close(oc->pb);", it will flush all encoded data to disk, I tried to call method "avcodec_flush_buffers" every time after calling "av_interleaved_write_frame", but no effect. I am newbie to FFmpeg, if you are familiar with FFmpeg, please help me.

  thanks in advance.

  Sean

• What is the correct way to pass cookies by ffmpeg ?

  9 juin 2016, par Don Donllei

  I'm trying to use ffmpeg to download a video from a list M3U8. But I'm having trouble passing cookie, I need to spend two cookie values which would be the right way to do this? with -headers or -cookie

  I tried this

      ffmpeg -cookies "cookiesent1=value1; path=/4947858-manifest.ism/; domain=example.com;"'\r\n'
  "cookiesent2=value2; path=/;    domain=example.com;"    -i "https://example.com/list.m3u8" -c copy -bsf:a aac_adtstoasc video.ts
  

  But not properly work the only thing is that returns

  Trailing options were found on the commandline.
  Hyper fast Audio and Video encoder
  usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...
  
  Use -h to get full help or, even better, run 'man ffmpeg'
  

• ffmpeg issue when recording screen+microphone+(music from file)

  9 juin 2016, par Taras Nikulin

  I'm trying to record using this command:

  ffmpeg -f avfoundation -pix_fmt nv12 -i "1:0" -r 30 -i monoSound.aac -filter_complex amerge=inputs=2 -vcodec h264 -qscale:v 0 -acodec aac -ab 128k -ac 1 -ar 44100 -async 30 outScreen.mp4
  

  I get such error:

  The following filters could not choose their formats: Parsed_amerge_0
  Consider inserting the (a)format filter near their input or output.
  Error configuring complex filters.
  Input/output error
  

  If i rewove this "-async 30", then no errors appear in terminal. But on final video sound will disappear after couple seconds.