Recherche avancée

Sur d’autres sites (11325)

• Batch processing using globs with libfdkaac and compiled libraries with media-autobuild-suite

  22 avril 2021, par Josh Vamos

  I am trying to process a folder full of media in .WAV format.
I have compiled ffmpeg with the media-autobuild-master and have the fdkaac libraries but I cannot figure out how I would do batch conversion. After compiling with the suite you have executables for fdkaac.exe which I am using directly in powershell.

  


  I have looked at the Execute "ffmpeg" command in a loop

  


  I can't wrap my head around how I would point the program to the correct file path while keeping the syntax intact.

  


  .\fdkaac.exe -m 3 'X:\PATH\file.wav' -o 'X:\PATH\file.m4a'


  


  Should I be using ffmpeg with a flag to enable fdkaac instead ?

  


• Should a long Running video processing task to be done client side or server side

  27 avril 2021, par Ritwiz Sinha

  I was creating an application in react for uploading video and using a REST API to send that to the server and store in S3. I also wanted the simple audio version of the video for some other tasks and I am confused as to what might be the better way :

  


  

  1. Creating audio file on the fly when it is needed using node-ffmpeg package and not store it anywhere

  


  2. Start converting the video file to audio on the browser client only, and posting that to the server for storage along with the video.

  


  3. Just post the video to the server and use queue system for creating a new task for video conversion to audio and then save that to the S3 storage.
The second method seems to be saving some compute power on the server but it might be a problem if the video upload completes, audio conversion is still going on and the client disconnects.
Would appreciate some help, thanks.

  


  


• ffmpeg simple re-mux short video : Invalid data found when processing input

  19 mai 2021, par Nic

  I try to remux (surveillance cam) raw AVC files (file header begins with "STL Stream Format v1.0") to get playable MP4 files.

  


  The command I used does work for the longer file but not for the short one :

  


  .\ffmpeg.exe -framerate 25 -i video.ssf -c copy video.mp4


  


  Good result for long video :

  


  Trailing option(s) found in the command: may be ignored.
Input #0, h264, from 'file.ssf':
  Duration: N/A, bitrate: N/A
  Stream #0:0: Video: h264 (Baseline), yuv420p(progressive), 704x576, 25 fps, 25 tbr, 1200k tbn, 50 tbc
Output #0, mp4, to 'file.mp4':
  Metadata:
    encoder         : Lavf58.76.100
  Stream #0:0: Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(progressive), 704x576, q=2-31, 25 fps, 25 tbr, 1200k tbn, 1200k tbc
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
[mp4 @ 0000020c1a048240] Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly
[NULL @ 0000020c1997f640] sps_id 32 out of range00:00:00.00 bitrate=384000.0kbits/s speed= 0.2x
frame= 4814 fps=0.0 q=-1.0 Lsize=   21829kB time=00:03:12.52 bitrate= 928.9kbits/s speed=2.34e+03x
video:21808kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.098001%


  


  Bad result for short video :

  


  [AVIOContext @ 000002c6db8e6d80] Statistics: 846679 bytes read, 0 seeks
video.ssf: Invalid data found when processing input


  


  Is there anything I can adjust to fix this ?

  


  Thanks !

  


  Nico