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• How to use ffmpeg to encode mp4 to mov

  28 juin 2021, par user1526912

  I trying to use ffmpeg to encode a video for the first time. Can anyone tell me the exact command to encode a video in the following format :

  



  Music Video HD Source Profile

  



  ● Apple ProRes 422 (HQ)
● VBR expected at 220 Mbps
● HD encoded dimensions accepted to support square pixel aspect ratios (PASP) :
Encoded PASP Converted to ProRes From
1920 x 1080 1:1 HDCAM SR, D5, ATSC
1280 x 720 1:1 ATSC progressive

  



  ● HD encoded dimensions accepted to support non-square pixel aspect ratios (this allows you to send HD video in the native dimensions of your best original source, for example in HD broadcast dimensions*) :

  



  Encoded PASP Converted to ProRes From
1440 x 1080 1:1.33333 XDCAM-HD, HDCAM
1280 x 1080 1:1.5 DVCProHD interlaced
960 x 720 1:1.33333 DVCProHD progressive

  



  Native frame rate of original source :

  



  ● 29.97 interlaced frames per second for video sourced
● 24 or 25 progressive frames per second for film sourced
● 23.976 progressive frames for inverse telecine sourced from film
● Telecine materials will not be accepted

  



  ● HD source may be delivered matted : letterbox, pillarbox, or windowbox.

  



  Music Video Audio Source Profile

  



  Stereo
● MPEG-1 layer II stereo
● 384 kpbs
● 48Khz
● Included in the same file as the delivered video

  


• FFmpeg still running but don't render HLS file in WPF application [closed]

  22 octobre 2020, par anhpt233

  I had apply ffmpeg to my wpf app with C# for live streaming and split it for upload to the server. But I has a problem with this command. It's will stop render hls file after more than 30m. And when I check process in task manager, ffmpeg.exe still running with 0% CPU and memory.

  


  I had change "preset" to "ultrafast" and config "rtbufsize" is 100M, but it's can't resolve this problem.

  


  I think maybe the client was out-of-memory, not sure. But I don't know how optimal or fix this issue. Anybody can help me ? Thanks so much !

  


  Here is my code :

  


  ffmpeg -f dshow -framerate 30 -i video="Logitech HD Webcam C270":audio="Microphone (HD Webcam C270)" -y - rtbufsize 100M - f gdigrab - framerate 30 - probesize 10M - draw_mouse 1 - i desktop -filter_complex  "nullsrc = size = 1440*480 [base];[0:v]setpts = PTS - STARTPTS ,scale = 720*480 [upperleft] ; [1:v]setpts = PTS - STARTPTS,scale = 720*480 [upperright];[base][upperleft]overlay = shortest = 1:x = 0:y = 0[tmp1];[tmp1][upperright]overlay = shortest = 1:x = 720:y = 0" -c:v libx264 -crf 23 -force_key_frames "expr: gte(t, n_forced * 2)" -preset veryfast -tune zerolatency -pix_fmt yuv422p -f hls -hls_time 4 -hls_playlist_type vod -start_number 0 -hls_segment_filename index%d.ts 480p.m3u8


  


• Ffmpeg - What changes to make in the code to adapt it to the GPU with the filter_complex option

  2 décembre 2020, par Jérémie Martin

  Good morning all,

  


  For a project, I have to take 8 videos as input and process them to position them correctly. The code below works in CPU :

  


  ffmpeg -i ${arr[1]} -i ${arr[2]} -i ${arr[3]} -i ${arr[4]} -i ${arr[5]} -i ${arr[6]} -i ${arr[7]} -i ${arr[8]} -filter_complex "nullsrc=size=1920x1080 [base]; [0:v] setpts=PTS-STARTPTS, scale=1440x810 [upperleft]; [1:v] setpts=PTS-STARTPTS, scale=480x270 [lowerleft]; [2:v] setpts=PTS-STARTPTS, scale=480x270 [lower2]; [3:v] setpts=PTS-STARTPTS, scale=480x270 [lower3]; [4:v] setpts=PTS-STARTPTS, scale=480x270 [lowerright]; [5:v] setpts=PTS-STARTPTS, scale=480x270 [upper2]; [6:v] setpts=PTS-STARTPTS, scale=480x270 [upper1]; [7:v] setpts=PTS-STARTPTS, scale=480x270 [upperright]; [base][upperleft] overlay=shortest=1 [tmp1]; [tmp1][lowerleft] overlay=shortest=0:y=810 [tmp2]; [tmp2][lower2] overlay=shortest=0:x=480:y=810 [tmp3]; [tmp3][lower3] overlay=shortest=0:x=960:y=810 [tmp4]; [tmp4][lowerright] overlay=shortest=0:x=1440:y=810 [tmp5]; [tmp5][upper2] overlay=shortest=0:x=1440:y=540 [tmp6]; [tmp6][upper1] overlay=shortest=0:x=1440:y=270 [tmp7]; [tmp7][upperright] overlay=shortest=0:x=1440" -c:v libx264 /$2/Vue1.mov


  


  I would like it to work with my GPU.
I can run commands such as :

  


  ffmpeg -y -hwaccel cuvid -c: v h264_cuvid -vsync 0 -i video.MOV -vf scale_npp = 1280: 720 -vcodec h264_nvenc /home/output.MOV


  


  Thank you for your help