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• Anomalie #3296 : Styles des boutons d’actions des Box

  15 octobre 2014, par Nicolas Dorigny

  J’ai regardé les css de la nouvelle version, c’est un peu différent.
  On peut coller une rustine pour supprimer les bordures des buttons mais c’est pas suffisant, il y a des positionnements qui sautent dans certains thèmes.

  Apparemment, il ne distribue plus les mêmes thèmes que ceux qu’on propose, il n’y a plus que cinq exemples (numérotés, pas nommés).
  Ou bien je ne les ai pas trouvés.
  http://www.jacklmoore.com/colorbox/

  Est ce qu’il ne faudrait pas repartir de ces cinq thèmes, et ne proposer que ceux là en config ?
  (et refaire les captures au passage)

• How to trim a video file at a precise position without re-encoding using FFMPEG [closed]

  2 août 2024, par Wassim Erriha

  I am having trouble trimming video files without causing the Video/Audio to go out of sync.
From what I understand, using the seek argument -ss before or after the input file results in two different behaviors. 
For Example :

  



  ffmpeg  -ss 00:00:00.600 -i in.mp4 -c copy out.mp4 


  



  This produces a trim with accurate A/V sync but a rough audio trim (trim happens at a video key frame and not the precise seek value)

  



  ffmpeg  -i in.mp4 -ss 00:00:00.600 -c copy out.mp4


  



  This produces a more accurate audio trim but causes A/V to go out of sync. Frames after the trim position are dependent on frames before the trim position.These frames are assigned negative timestamps and copied to output file, which results in video being out of sync with audio during playback.

  



  On the other hand,

  



  ffmpeg  -i "in.mp4" -ss 00:00:00.600 -strict -2 out.mp4


  



  This produces a more precise trimming and A/V sync.
The trim task takes a long time to run and results in quality loss.

  



  My Question is :
Is there a way to get an accurate trim without re-encoding the video ?
maybe by discarding the extra frames at the beginning that cause the A/V to get out of sync.
In my case, I can live with a few black frames in the beginning, as long as the audio is trimmed at the precise position and A/V sync is preserved.
Is it possible to accomplish this using FFMPEG ?
if not, can MediaCodec on Android handle such precision when trimming ?

  



  Thanks for your time.

  


• FFMPEG and an additional bash statement on the generated files [migrated]

  17 mars 2023, par Vodek

  I use FFMPEG instructions to download video and audio from the camera via RTSP protocol to a local hard drive. Here is my manual that I use :

  


  ffmpeg -y -re -rtsp_transport tcp -i "rtsp:/USERNAME:PASSWORD@192.168.1.183/cam/realmonitor?channel=1&subtype=0" -f segment -vcodec copy -af asetrate=22050 -segment_time 120 -strftime 1  -segment_format mp4 "ffmpeg_capture-%Y-%m-%d_%H-%M-%S.mp4"


  


  After each generation of a 120 sec file, I would like to execute a BASH instruction on it and I don't know how to go about it. I'd like to be able to do something with the file after it's created in each iteration of the segment. After starting FFMPEG, the file is created immediately, but it is ready only after 120sec has passed. Can you send some simple bash script to the file generated in FFMPEG ?

  


  I tried to follow the instruction :

  


  ffmpeg -y -re -rtsp_transport tcp -i "rtsp:/USERNAME:PASSWORD@192.168.1.183/cam/realmonitor?channel=1&subtype=0" -f segment -vcodec copy -af asetrate=22050 -segment_time 120 -strftime 1  -segment_format mp4 "ffmpeg_capture-%Y-%m-%d_%H-%M-%S.mp4"


  


  then in a standalone bash script I tried to do something with the files but they weren't finished yet.