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• how to use ffmpeg with gpu support on macos

  26 décembre 2023, par Soroush Tayyebi

  When I exec ffmpeg command, it use my CPU to render videos, it take long time to do this job, how i can force ffmpeg use my GPU to render ?

  


  I have a macOS with AMD Radeon R9 M370X 2048 MB Graphic card. What I must install and what command i must use for this work ?

  


  I use this commands when my script run :

  


  $source_decoder = "ffmpeg -i $film_aval_source -vf drawtext=\"text_shaping=1:fontfile=$font_source:
    text='$esme_film': fontcolor=black: fontsize=$font_size: box=1: boxcolor=black@0:
    boxborderw=0: x=(w-text_w)/2: y=(h-text_h)/2 :enable='between(t,5,10)'\"  -c:a copy -force_key_frames 0:05:00,0:6:00 $film_aval_dest";

$source_decoder = "ffmpeg -i $film_aval_source -i ".$path."/Data.jpg -filter_complex '[0:v][1:v]overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2:enable=between(t\,5\,10)' -codec:a copy $film_aval_dest";

$convert1 = "ffmpeg -i $film_aval_dest -map 0 -flags:v +global_header -c:v libx264 -bsf:v dump_extra ".$path."output1.ts";

$convert_logo = "ffmpeg -i $path_tmp -i ".$main_path."/data/logo.png -filter_complex 'overlay=4:4' -codec:a copy $path_tmp2";

$convert2 = "ffmpeg -i $path_tmp2 -map 0 -flags:v +global_header -c:v libx264 -bsf:v dump_extra ".$path."output2.ts";
$merge = "ffmpeg -i 'concat:".$path."output1.ts|".$path."output2.ts' -map 0 -flags:v +global_header -c:v libx264 -bsf:v dump_extra ".$path."output_new.ts";
$convert3 = "ffmpeg -i  ".$path."output_new.ts -acodec aac -vcodec copy ".$path."video_out2.mp4";


  


  thanks

  


• How use FFMPEG multi GPU proccess

  31 janvier 2021, par R.A.M

  
I have a problem and cant find any suitable answer for it.
  
Its about use multi GPU proccess.
  
I have 3 graphic card and you could see it :

  
[![enter image description here][1]][1]


  if image not loaded use this image link : https://i.stack.imgur.com/msR83.jpg enter link description here

  

  
My problem is : when i run more than one ffmpeg command with cuda all process assigned to first GPU.
  
like below image :

  
[![enter image description here][2]][2]


  if image not loaded use this image link : https://i.stack.imgur.com/PfYfz.jpg

  


  you see ? all 6 proccess assigned to first GPU.
  
I really confused how could i fix it.
  

  
my FFMPEG code is :
  

  


  ffmpeg -y -vsync 0 -hwaccel cuda -hwaccel_output_format cuda -i my-video.mp4 \
  -vf scale_npp=w=426:h=240 -c:v h264_nvenc -profile:v main -b:v 400k -sc_threshold 0 -g 25 \
  -c:a aac -b:a 64k -ar 48000 \
  -f hls -hls_time 6 -hls_playlist_type vod \
  -hls_allow_cache 1 -hls_key_info_file encription.keyinfo \
  -hls_segment_filename f-0-seg-%d.ts f-0.m3u8


  


  i run top FFMPEG code for 6 diffrent video at same time.
  
please help to find answer. by sharing your knowledge or some links that could help me.
  
Thanks a lot.

  


• Play mpeg-2 file with 608/708 embedded captions out Decklink SDI

  29 octobre 2022, par asperi

  I have built ffmpeg with decklink support, it plays my mpg file fine out the SDI but not seeing any captions on my works broadcast monitor (JVC DT-V17G1Z). This monitor shows captions on SDI from my Mojito card but trying to get it to work with a BlackMagic 4k extreme. The mpg file has embedded 608 and 708 captions. Using the to play-

  


  ffmpeg -i C:\video\RD2838_720p.mpg -f decklink -pix_fmt uyvy422 "DeckLink 4K Extreme"


  


  MediaInfo on captinos :

  


  Text #1


  


  ID : 4096 (0x1000)-CC1
Menu ID : 1 (0x1)
Format : EIA-608
Muxing mode : A/53 / DTVCC Transport
Muxing mode, more info : Muxed in Video #1
Duration : 28 min 30 s
Bit rate mode : Constant
Stream size : 0.00 Byte (0%)
Language : English
CaptionServiceName : CC1

  


  Text #2
ID : 4096 (0x1000)-1
Menu ID : 1 (0x1)
Format : EIA-708
Muxing mode : A/53 / DTVCC Transport
Muxing mode, more info : Muxed in Video #1
Duration : 28 min 30 s
Bit rate mode : Constant
Stream size : 0.00 Byte (0%)
Language : English

  


  How do I get the Decklink 4k to pass the captions ? Thanks !