Recherche avancée

Sur d’autres sites (7067)

• Merging four videos with differnt resolution in a Grid with ffmpeg

  5 juillet 2015, par Taufiq

  I want to marge four videos in to one as show below. I have achieve the correct output given all the videos have the same resolution. But I get an undesirable result with different resolution. See below for more details.

  ffmpeg code to get to merge 4 videos of different resution in a grid format

  ffmpeg.exe -i "1.avi" -vf "[in] scale=iw:ih, pad=2*iw:ih [left];movie=2.avi, scale=iw:ih [right]; [left][right] overlay=main_w/2:0 [out]" -b:v 768k "Output1.mp4"
  
  ffmpeg.exe -i "3.avi" -vf "[in] scale=iw:ih, pad=2*iw:ih [left];movie=4.avi, scale=iw:ih [right]; [left][right] overlay=main_w/2:0 [out]" -b:v 768k "Output2.mp4"
  
  ffmpeg.exe -i "Output1.mp4" -vf "pad=iw:2*ih [top]; movie=Output2.mp4 [bottom]; [top][bottom] overlay=0:main_h/2" "Output_Stacked.mp4"

  Code above gives the follow output.

  

  But the problem arises when I rotate one of the videos and merge them.
  .

  Please tell me what I need to change to get the desired result. Thanks
  

• Windows server crashs in video transcode during

  6 février 2019, par parsa

  I’m using ffmpeg for transcoding of my videos on a HP Blade dedicated server with these details :

  OS : Windows Server 2012 R2 64Bit
  CPU : Intel XEON X5650
  RAM : 16GB
  Hard disk : A sas normal disk

  This command is a sample for creating qualities which has 4K as top level and
  I use this command for creating lower qualities from that as parallel at the same time.

  ffmpeg -i input.mp4 -filter_complex 
  
  [0:v]split=4[s0][s1][s2][s3];
  
  [s0]scale=uhd2160[v0];
  
  [s1]scale=hd1080[v1];
  
  [s2]scale=hd720[v2];
  
  [s3]scale=hd480[v3];
  
  [s4]scale=nhd[v4];
  
  [s5]scale=cga[v5]
  
  -map [v0] -map [v1] -map [v2] -map [v3] -map [v4] -map [v5] -map 0:a 
  
  -c:v libx264 -c:a aac -f tee -g 48 -threads 0 
  
  "[select='v\:0,a':f=hls:hls_list_size=0:hls_time=6]../video/2160p/out.m3u8| 
  
   [select='v\:1,a':f=hls:hls_list_size=0:hls_time=6]../video/1080p/out.m3u8| 
  
   [select='v\:2,a':f=hls:hls_list_size=0:hls_time=6]../video/720p/out.m3u8| 
  
   [select='v\:3,a':f=hls:hls_list_size=0]../video/480p/out.m3u8| 
  
   [select='v\:3,a':f=hls:hls_list_size=0:hls_time=6]video/360p/out.m3u8| 
  
   [select='v\:3,a':f=hls:hls_list_size=0:hls_time=6]video/200p/out.m3u8"

  Some times in transcoding time windows goes to reconnecting and count up to 20 and then goes to black screen.
  I cannot find anythings in windows logs.
  And finally I restart server from button of that server.
  What’s hapenning ?
  How can I find a clue, about this issue ?
  Any one know anything about this issue ?

• FFMPEG bash > folder processing > AI upscale - script ERROR ">" [closed]

  13 novembre 2022, par Jason Paul Michaels

  Trying to port a single file manual command from Topaz AI so I can run it as a part of a simple script allowing me to run multiple sessions from terminal. I am running MacOS with BASH 5.2 and when I run the script I get dumped to ">" instead of command prompt and no error message is displayed.

  


  This is my command -

  


  for f in *.mp4; do
  /Applications/Topaz\ Video\ AI.app/Contents/MacOS/ffmpeg \
    -hide_banner \
    -nostdin \
    -y \
    -nostats \
    -i “$f” \
    -vsync 0 \
    -avoid_negative_ts 1 \
    -sws_flags spline+accurate_rnd+full_chroma_int \
    -color_trc 1 \
    -colorspace 1 \
    -color_primaries 1 \
    -filter_complex veai_up=model=prob-3:scale=0:w=1920:h=1080:preblur=0:noise=0:details=0:halo=0:blur=0:compression=0:estimate=20:device=0:vram=1:instances=1,scale=w=1920:h=1080:flags=lanczos:threads=0,scale=out_color_matrix=bt709 \
    -c:v prores_videotoolbox \
    -profile:v lt \
    -pix_fmt p210le \
    -allow_sw 1 \
    -map_metadata 0 \
    -movflags frag_keyframe+empty_moov+delay_moov+use_metadata_tags+write_colr \
    -map_metadata:s:v 0:s:v \
    -map_metadata:s:a 0:s:a \
    -c:a aac \
    "encoded/${f%.*}.mp4”;
done


  


  I have a feeling it's something really simple I'm missing but I've gone through it a dozen times and can't seem to modify in any way to success.

  


  Thank you !

  


  Getting dumped back to ">" terminal prompt.