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• What is the best solution to convert old videos to newer more optimised formats ? [on hold]

  9 septembre 2019, par Jack

  Not too sure if this is the wrong place - please move it as I couldn’t find a more suitable network

  I have loads of media (Movies, TV Shows) as well as home videos (old VHS stuff ripped using some awful VHS to digital kit)

  Most of the movies/TV shows are in H264 (MP4/MKV containers) format, however some older ones are in AVI and WMV - I’d like to convert these into either H264 or a newer format (HEVC ?) To save some disk space and also because WMVs and AVIs are getting harder to deal with nowadays. I’m concerned about losing quality and am wondering what would be the best compromise in terms of converting these to HEVC/MPEG4’s encoder quality settings as compared to the data savings.

  The media collection of TV shows/movies, I don’t mind too much about losing some quality but the home videos/VHS tapes I have in old file formats, the storage factor for these is less important but I was wondering what I’d need to do to convert old AVI’s/MPEG2’s to MPEG4/HEVC - mainly if it is possible to convert one of these old video files to a newer format, without loss of quality, I thought the newer video encoding’s had lossless and lossy compression, but I could be completely wrong and don’t know much about video codecs.

  I was more curious on the best solution to do this as, Googling it gives me loads of commercial software and I’d rather have something which I can use command line/programmatically against my entire libraries. I also couldn’t find anything on these commercial sites about the technicals of re-encoding video so, was wondering if anyone had any experience with any command line applications/have an understanding of the video codecs.

• avcodec/h264_parse : Treat escaped and unescaped decoding error equal in decode_extrad...

  25 novembre 2017, par Michael Niedermayer

  avcodec/h264_parse : Treat escaped and unescaped decoding error equal in decode_extradata_ps_mp4()
  Fixes : lorex.mp4
  
  Fixes : ticket6762
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/h264_parse.c

• Convert a video file to an image sequence of equal length ?

  5 janvier 2024, par Jeremy

  How using FFMPEG do I convert a video file to a sequence of images that is equal in duration/frames to the original video file ?

  



  I'm trying to import video into the non comercial version of Nuke on Linux which refuses to accept h.264 and doesn't have handy a list of accepted codecs that I can find...but plays nice with images sequences...but I can't get the sound to line up with the image sequence.

  



  I tried getting a look at the framerate with :

  



  ffprobe -v 0 -of compact=p=0 -select_streams 0 -show_entries stream=r_frame_rate Forest.mp4 


  



  which returns :

  



  r_frame_rate=30/1


  



  and then I run

  



  ffmpeg -i Forest.mp4 -r 30/1 forest/jpegs%06d.jpg