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• How to encode video with ffmpeg using AMD h264_amf

  10 novembre 2022, par Ivy Growing

  Given :

  


  

  • Win10

  


  • AMD CPU

  


  • Video capturing card Avermedia Live Gamer Extreme 3

  


  • ffmpeg versions and encoders :

  


  


  >ffmpeg.exe -encoders | find "264"
ffmpeg version 5.1-full_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers
// cut
 V....D libx264              libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (codec h264)
 V....D libx264rgb           libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 RGB (codec h264)
 V....D h264_amf             AMD AMF H.264 Encoder (codec h264)
 V....D h264_mf              H264 via MediaFoundation (codec h264)
 V....D h264_nvenc           NVIDIA NVENC H.264 encoder (codec h264)
 V..... h264_qsv             H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (Intel Quick Sync Video acceleration) (codec h264)


  


  Required to capture the video into H.264 encoded file using AMD's hardware accelerator in the CPU (AMF, or VCE).
Tried : ffmpeg -y -f dshow -rtbufsize 2002000k -framerate 30 -i video="Live Gamer EXTREME 3"  -t 00:00:10  -c:v h264_amf output.ts
Result :

  


  Input #0, dshow, from 'video=Live Gamer EXTREME 3':
  Duration: N/A, start: 88548.973998, bitrate: N/A
  Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422(tv, bt709/bt709/unknown), 1280x720, 30 fps, 30 tbr, 10000k tbn
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (h264_amf))
Press [q] to stop, [?] for help
[h264_amf @ 000002404328c700] DLL amfrt64.dll failed to open
Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
Conversion failed!


  


  For some reason ffmpeg uses resolution 1280x720... When trying to specifiy the capture card resolution the following error appears :

  


  >ffmpeg -y -f dshow -rtbufsize 2002000k -framerate 30 -video_size 3840x2160 -i video="Live Gamer EXTREME 3" -r 30 -t 00:00:10   -c:v h264_amf -f mpegts output.ts
//cut
[dshow @ 0000029d7c0f84c0] Could not set video options
video=Live Gamer EXTREME 3: I/O error


  


  This is not unique error for Avermedia card. The same error appears with Dell web cam and for Magewell.

  


  From this answer the extra flags to be used with h264_amf. I guessed the default values should be good enough. It seems something needs to be configured or initialized when using AMF/VCE.

  


  The video encoding in software (without AMF) works just fine but loads the CPU. The goal is using dedicated hardware module and release computational power of the CPU for the other apps.

  


  Command example will be appreciated.

  


• laravel ffmpeg upload video in amazon s3 failed 504 gateway Time-out

  21 mai 2020, par Ahmed Al-Rayan

  Why after uploading a video size of more than 1 Giga, I see a problem in the nginx 504 gateway timeout preventing me from completing the processing process. The meaning of the video after uploading starts the processing process and because of this problem it does not go to processing use laravel ffmpeg and use amazon s3 service to store the videos on it and the entire site uploaded to Digital hosting

  


• Video Feedback Loop with ffmpeg

  4 mai 2020, par driangle

  I am trying to create a digital video feedback loop between two computers.

  



  What I mean by this is the following :

  



  

  



  I attempted several combinations of protocols and video formats and I found out this is the closest I can get. The original video was an "mov" but I had to convert it to .ts in order to get this far, had other issues when using mov or mp4.

  



  I ran the commands in this order to make sure tcp listeners were up before the clients.

  



  On Local Computer

  



  # Command 1: Temporary attempt to capture output of loop
ffmpeg -i 'udp://0.0.0.0:6002?listen&overrun_nonfatal=1' -c copy out.ts


  



  # Command 2: Receives stream from remote host and forwards back to beginning of loop
ffmpeg -i tcp://0.0.0.0:6001?listen -f mpegts udp://localhost:6002


  



  On Remote Computer

  



  #  Command 3: Receives stream from local host and returns stream to another ffmpeg instance
ffmpeg -i tcp://0.0.0.0:6000?listen -f mpegts tcp://:6001


  



  On Local Computer

  



  # Command 4: Sends stream to remote host
ffmpeg -re -i in.ts  -f mpegts tcp://:6000


  



  The steps above don't quite complete the feedback loop, but they do result in a successful video out.ts

  



  Then I tried to modify Command 4 so that it could merge both a file and a udp stream, this is a naive attempt I know, I am not very good with ffmpeg.

  



   ffmpeg \
    -re -i in.ts -i udp://0.0.0.0:6002 \
    -filter_complex " \
        [0:v]setpts=PTS-STARTPTS, scale=540x960[top]; \
        [1:v]setpts=PTS-STARTPTS, scale=540x960, \
             format=yuva420p,colorchannelmixer=aa=0.5[bottom]; \
        [top][bottom]overlay=shortest=1" \
    -f mpegts tcp://:6000


  



  The result was that the command hung waiting for a data on the udp port, which makes sense in hindsight.

  



  I would like to know :

  



  

  • Can this be done at all ? If so, what do I need to change ?

  


  • Do I need to abandon ffmpeg for this task and look into something else ?

  


  



  If you're asking why would I do this, the answer is there is no good reason other than I am curious to know if it's possible and what results it would yield.