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• (Cross-platform) FFMPEG based GUI direct stream copy linear video editor [on hold]

  14 octobre 2014, par Fluorescent Hallucinogen

  FFMPEG official site has list of FFMPEG based projects (https://trac.ffmpeg.org/wiki/Projects).

  I use VirtualDub for linear video montage using direct stream copy mode (without recompression). It is GNU GPL licensed, but is designed only for Microsoft Windows and operates only AVI files.

  FFMPEG is excellent cross-platform utility that supports many formats (codecs and containers). It can be used for split and merge video files (not only AVI) using direct stream copy mode, but FFMPEG is console UI application.

  Is there GUI video editor (based on FFMPEG) (cross-platform or maybe only for Linux or maybe only for Windows) that can split and merge video files (not only AVI) using direct stream copy mode and have preview window ?

  Now I use video player, watch the input video file, remember the time for split video to fragments and write console line script for merge these fragments. All work is OK, but it is very inconvenient.

  At the worst, are there players or editors that can generate project file (that contains time markers for split and merge) that can be used with FFMPEG ?

• How to specify the GPU to be used by nvenc in ffmpeg [closed]

  25 septembre 2022, par Gio

  I'm using compiled ffmpeg executable for transcoding mpegts stream from h264 to h265 with nvenc. I have two nvidia Graphics Cards installed on my motherboard : GeForce GTX 690 and Tesla k-10. Is there any codec specific parameters for nvenc to choose the GPU I want to encode with ?

  


• ffmpeg encode single input to multiple outputs simultaneously

  23 août 2019, par jippyjoe4

  Suppose I have a single input file that I would like to transcode into two different formats (ProRes and Mp4). Individually, the two commands I would use look like this :

  To convert it to mp4, I would use :

  ffmpeg -i in.mov -c:v libx264 -x264-params "nal-hrd=cbr" -b:v 30M -minrate 30M -maxrate 30M -bufsize 60M "out.mp4"

  And to convert it to ProRes, I would use :

  ffmpeg -i in.mov -c:v prores_ks -profile:v 2 -bits_per_mb 540 -vendor apl0 -pix_fmt yuv422p10le "out.mov"

  Rather than running these two commands sequentially to do the conversion, I think ffmpeg can encode to both formats simultaneously and save time. I’ve read this page (https://trac.ffmpeg.org/wiki/Creating%20multiple%20outputs), but I find it confusing. I tried something along the lines of :

  ffmpeg -i "in.mov" \
  
   -c:v libx264 -x264-params "nal-hrd=cbr" -b:v 30M -minrate 30M -maxrate 30M -bufsize 60M "out.mp4" \
  
   -c:v prores_ks -profile:v 2 -bits_per_mb 540 -vendor apl0 -pix_fmt yuv422p10le "out.mov"

  But attempting to run this just gives me the error :

  Unable to find a suitable output format for '\

  I don’t quite understand what’s going wrong. How can I encode my single input to both outputs simultaneously ?