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• Batch file to perform multiple conversions in a row

  16 septembre 2020, par ben158

  I'm trying to write a batch file that can be launched from Handbrake GUI with the "send file to" feature, that will split an MKV into chapters with MKVmerge, then convert all those new files into mp4s with ffmpeg. Handbrake passes only one argument into the batch file, the full file path of the output (surrounded by quotes). I'm very new to batch scripting and am having difficulty getting it all to work together — all the individual parts work just fine when absolute paths are given. Here's the content of the .bat file :

  


  START /WAIT "C:\Program Files\MKVToolNix\mkvmerge.exe -o output.mkv --split chapters:all %1"
for %%i in (*.mkv) do C:\ffmpeg\bin\ffmpeg.exe -i "%%i" -loop 1 -i "%%~dpi"\folder.jpg -map 1:v -map 0:a -c:a ac3 -b:a 640K -pix_fmt yuv420p -c:v libx264 -shortest -fflags +shortest -max_interleave_delta 100M "%%~ni.mp4"


  


  Any glaring mistakes I'm making ? I've been at this for hours reading SO threads and documentation, and can't figure it out for the life of me. Any help is appreciated, thanks in advance.

  


• Fragmented MP4 has wrong duration in Windows Media Player

  3 février 2020, par Expressingx

  I’m streaming video from a camera to a file using ffmpeg. The case to use Fragmented MP4 is that there can be sudden power off and lose the video. I’ve configured the fragments to be at least 30 secs and this is how much the Windows Media Player reports for the duration even if its 2 hours long, after that it keeps streaming the video but is not seekable after the 30th second. How can be that fixed ?

  ffmpeg -c copy -movflags frag_keyframe+separate_moof+omit_tfhd_offset -min_frag_duration 30000000 -bsf:a aac_adtstoasc \ out.mp4

  If I use -movflags frag_keyframe+empty_moov then the video is not seekable at all and no duration reported.

  I aim for seekable video with correct duration both on VLC/Windows Media Player

  Version of ffmpeg : 3.3.4

• How to get Bitrate and FPS statistics with ffplay

  30 novembre 2016, par S4M11R

  I would like to measure statistics (FPS, Bitrate) from a ffplay command instead of ffmpeg. This because recording for many hours takes a lot space on disk.

  The way I do it now is that I record a video with ffmpeg for a specific duration and save statistics (-qphist) in a file

  Command :

  ffmpeg -rtsp_transport tcp -t $duration -i rtsp://$cred/axis-media/media.amp?videocodec=h264 -qphist -vcodec copy -r 60 -y $outputDIR/camRecording_h264.avi &> $logfile &

  Instead I would like to play a rtsp video and collect statistics so that video is not saved on disk but still get the same statistics.

  Command

  ffplay "command" &> file

  With ffplay I can get some info with loglevel but nothing about FPS or Bitrate

  I checked man ffplay and googled around but could not find anything about this.

  Is it even possible to get FPS and Bitrate statistics from ffplay ?

  Best regards