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• ffmpeg direct show obvoius problem. ffmpeg is not letting to reconnect to camera

  11 avril 2021, par josh joyer

  I use ffmpeg with command

  


  ffmpeg -f dshow -i video="@device_pnp_\\?\usb#vid_1908&pid_2311&mi_00#6&353461d3&0&0000#{65e8773d-8f56-`11d0-a3b9-00a0c9223196}\global" output.mkv`


  


  It is fine to record camera but it uses direct show standard
Microsoft Windows library that is faulty.
Once connected to camera one is unable to use camera again or disconnect from it.
One should restart computer to connect to camera again.
Microsoft tells not to use direct show (dshow) for camera but
to use AForge or VisioForge libraries.

  


  But ffpmeg uses faulty dshow library. Is there any way to
change direct show to some other so one could connect to camer multiple times ?

  


• FFMPEG : Convert multiple movies into plex direct play format

  4 avril 2021, par Sascha

  I have a large movie base which I watch over plex (Apple TV plex client with raspberry 4 plex server). However, for standardization and to ensure better direct play with plex, I wanted to convert the movies/series to new format.

  


  Therefore, my idea was to convert all movies to

  


  

  1. 1080p (1920*1080) / 16:9

  


  2. 30 fps

  


  3. mkv container

  


  4. H.264 (libx264)

  


  5. 8 bit Video Depth

  


  6. 320 kbps audio AAC

  


  7. keep only German and English version (audio / subtitle)

  


  


  which seems to be good settings for sustainable standardization. Dont know, if other settings (e.g. hevc) would be better. However, I can't combine the commands with the right ffmpeg options to let my server convert in the background. By now, I came up with the following two commands, which I want to combine, once ffmpeg gives me the right output, which it does not at the moment. It breaks in the conversion process and does not keep only German and English subtitles and audio. I

  


  Hope someone can help me out. Thanks a lot.

  


  find . -name '*.mp4' -or -name '*.wav' -exec ffmpeg -i {} basename {}.mkv \; -exec rm {} \;

for f in *.mkv; do echo "Starting with ${f} @ $(date +%T)"; ffmpeg -hide_banner -i "${f}" -map_metadata:g -1 -movflags faststart -c:v libx264 -preset slow -crf 20 -pix_fmt yuv420p -vf scale=1920:-1,setdar=16/9 -filter:v fps=fps=30 -c:a aac -b:a 320k -map0:s "${f}.2.mkv"; echo "Finished with ${f} @ $(date +%T)"; done


  


• cmdutils : replace strncpy() with direct assignment

  24 février 2021, par Anton Khirnov

  cmdutils : replace strncpy() with direct assignment
  Only one character is actually rewritten.
  Fixes truncation warnings, such as
  
  warning : ‘strncpy’ output truncated before terminating nul copying 3 bytes from a string of the same length [-Wstringop-truncation]
  
  in gcc 10.2.0
  

  • [DH] fftools/cmdutils.c