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• avformat/utils : Remove redundant save+restore

  8 octobre 2019, par Andreas Rheinhardt

  avformat/utils : Remove redundant save+restore
  If the size of the input packet is zero, av_grow_packet() used to call
  
  av_new_packet() which would initialize the packet and (in particular)
  
  reset the pos field. This behaviour (which was never documented and
  
  arguably always contradicted the documented behaviour) was changed in
  
  2fe04630. This means that it is unnecessary to save and restore the
  
  packet's position in append_packet_chunked().
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavformat/utils.c

• how do I save the videos in an specific bitrate using ffmpeg ?

  15 mai 2022, par david

  I am trying to save some videos in specific bitrate (8000k) and for this, I used the following code :

  


  ffmpeg  -i  input_1080p60  -c:v  libx264 -pix_fmt yuv420p  -b:v 8000K -bufsize 8000K -minrate 8000K -maxrate 8000K -x264opts keyint=120:min-keyint=120 -preset veryfast -profile:v high out_1080p.264


  


  but after saving the videos, I find out each video has a different bitrate except 8000k ( for example 5000k, 6000k, 7500k,...). but I define the minrate 8000k. do you know what is the problem and how can I force the above code to have the specific bitrate ? Thank you.

  


• php ffmpeg cannot save video to system temporary folder

  28 mai 2024, par user2818066

  I am trying to covert a video to h.264 format. I can save the new video to a normal directory but saving the new video to a Windows temp file fails. However I can manage to save a snapshot image from the video into Windows temp folder without problem. I cannot figure out what is the problem ?

  


  require_once(dirname(__FILE__).'/../vendor/autoload.php');

function get_ffmpeg_exe_path_arr_def(){ 
  return( array( 'ffmpeg.binaries'  => "C:/bin/ffmpeg.exe",
                 'ffprobe.binaries' => "C:/bin/ffmpeg.exe",
                 'timeout' => 3600000000, 'ffmpeg.threads' => 12
                )   )  ;  
}

$vid_inp = 'C:/Users/Jordan/Downloads/motorboat_org.mp4' ; 
$vid_out = 'C:/Users/Jordan/Downloads/motorboat_9.mp4' ;
$tmp_vid_out_file = tempnam(sys_get_temp_dir(), "Vid") ; //C:\Windows\Temp\VidA318.tmp 
$tmp_img_file = tempnam(sys_get_temp_dir(), "Img") ; //C:\Windows\Temp\ImgA234.tmp


$ffmpeg = FFMpeg\FFMpeg::create( get_ffmpeg_exe_path_arr_def() );
$video = $ffmpeg->open($vid_inp);
$format = new FFMpeg\Format\Video\X264('aac', 'libx264');

$video->frame(FFMpeg\Coordinate\TimeCode::fromSeconds(0.2))->save($tmp_img_file);
// Ok to save snapshot image to  C:\Windows\Temp\ImgA234.tmp 

$video->save($format, $vid_out); 
// This is ok to save video to  C:/Users/Jordan/Downloads/motorboat_9.mp4

$video->save($format, $tmp_vid_out_file); 
// This fails to save new video to   C:\Windows\Temp\VidA318.tmp  



 -------  Error Message -----
    Fatal error: Uncaught exception 'Alchemy\BinaryDriver\Exception\ExecutionFailureException' with message 
'ffmpeg failed to execute command "C:\AppServ\www/ecity/bin/windows/ffmpeg.exe" -y -i 
"C:/Users/Jordan/Downloads/motorboat_org.mp4" 
-threads 12 -vcodec libx264 -acodec aac -b:v 1000k 
-refs 6 -coder 1 -sc_threshold 40 -flags +loop 
-me_range 16 -subq 7 -i_qfactor 0.71 -qcomp 0.6 
-qdiff 4 -trellis 1 -b:a 128k -pass 1 -passlogfile 
 "C:\WINDOWS\TEMP\ffmpeg-passes66557e75d5e53hbzbo/pass-66557e75d6e0b" C:\Windows\Temp\VidEA8F.tmp: 
Error Output: ffmpeg version 4.3.2-2021-02-27-full_build-www.gyan.dev Copyright (c) 2000-2021 
the FFmpeg developers built with gcc 10.2.0 
(Rev6, Built by MSYS2 project) configuration: 
--enable-gpl --enable-version3 --enable-static 
--disable-w32threads --disable-autodetect 
--enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma 
--enable-libsnappy --enable-zlib --enable-libsrt 
--enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-li in C:\AppServ\www\ecity\vendor\php-ffmpeg\php-ffmpeg\src\FFMpeg\Media\AbstractVideo.php on line 106