Recherche avancée

Sur d’autres sites (7537)

• Batch script to convert all avi to mp4 and delete after conversion using HandBrake command line

  26 février 2014, par RarLines

  So easy and cool batch question. Sorry for this ultimate newbie question  !

  I've a folder which contains hundreds of videos like that :

  Video001 - Introduction.avi
  
  Video002 - History of Stack Overflow.avi
  
  Video003 - Before Asking.avi
  
  ...
  
  Video999 - Conclusion.avi

  I need re-encode all of them with x264 codec. Ffmpeg is very slow so I tried to use HandBrake. There is a command line edition of HB and great default presents. I could write this command for converting only one file with "Normal" present :

  HandBrakeCLI.exe -i "Video001 - Introduction.avi" -o "Video001 - Introduction.mp4" -Z Normal

  My question : How can I convert all of them in folder and delete after conversion process ? Thank you !

  Note : If you think ffmpeg is better solution I can give my fav present. Handbrake says about Normal present :

  Normal:  -e x264  -q 20.0 -a 1 -E faac -B 160 -6 dpl2 -R Auto -D 0.0 --audio-copy-mask aac,ac3,dtshd,dts,mp3 --audio-fallback ffac3 -f mp4 --loose-anamorphic --modulus 2 -m --x264-preset veryfast --h264-profile main --h264-level 4.0

• avformat/matroskadec : fix setting channel layout using the Channels element

  4 juillet 2022, par James Almer

  avformat/matroskadec : fix setting channel layout using the Channels element
  If the stream's channel layout is first set into a native layout using codec
  
  private parameters, this code here could potentially result in an invalid
  
  native layout where popcnt(ch_layout.u.mask) != ch_layout.nb_channels being
  
  propagated.
  Fixes : Timeout printing a billion channels
  
  Fixes : 48099/clusterfuzz-testcase-minimized-ffmpeg_dem_MATROSKA_fuzzer-6754782204788736
  Found-by : continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
  
  Tested-by : Michael Niedermayer <michael@niedermayer.cc>
  
  Signed-off-by : James Almer <jamrial@gmail.com>
  

  • [DH] libavformat/matroskadec.c

• HTML5 video (mp4) won't seek properly with Firefox 37/38/39 on Apache

  10 juin 2015, par degenerate

  Edit : Turns out this is actually a Firefox bug.

  Firefox will not seek properly past the loaded point in any mp4. It doesn’t matter what program encoded the file or where it came from ! I am hosting on Apache 2.2.29

  Obvious things you will probably ask me :

  • Yes I used -movflags faststart when encoding with ffmpeg
  • Yes AddType video/mp4 .mp4 is set correctly
  • This is a new problem without any changes to the server ; only the newer firefox (version 36, 37, 38+) has this issue.
  • Chrome works WONDERFULLY so this is a problem isolated to Firefox, and only started happening sometime in 2015 with one of the newer versions. Nothing was changed on the server.

  Firefox makes hundreds of requests after seeking to any point in the mp4. The closer to the end of the file, the more requests are made. Eventually after several minutes it will stop sending requests and finish playing ; I assume when this happens it has downloaded the entire mp4.

  Notice the byte-range request on chrome has a definitive size, yet all the requests one firefox are XXXXXX- with no ending byte...

  (FIREFOX = BAD, hundreds of requests — right click image to see full resolution)

  

  (CHROME = GOOD, one single request)

  

  Regarding keep-alives : I tried turning keepalive on and off. I get the same results in both browsers. Chrome is always able to seek, firefox is never able to seek.