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• FFMPEG : alphaextract+split create transparent video in 1080 x 1920 pixels not working

  30 juin 2021, par Karim Elhalloumi

  Create your transparent video :
i found a solution to a problem of creating alpha from a video then put it next to original as an output it give one video with original+alpha
using this ffmpeg cmd :

  


  ffmpeg -i video_name.video_extension -vf "split [a], pad=iw*2:ih [b], [a] alphaextract, [b] overlay=w" -y final_name_alpha.mp4


  


  source :https://docs.minsar.app/create/howtos/transparentvideos/
the problem is This operation with Ffmpeg will not work if your video is not in 16:9 format, or has no alpha background.

  


  Result :
CMD Result 
iwant put as input a template for phone size with black background and generate the 2 video in one

  


  what Iam trying to get is video.mp4 :
Process here

  


  I'm new to ffmpeg, is there any cmd to generate alpha next to original without having only black back ground and with 9:16 instead ?

  


  
ffmpeg version 4.4-essentials_build-www.gyan.dev Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 10.2.0 (Rev6, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-sdl2 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libgme --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libtheora --enable-libvo-amrwbenc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-librubberband
  libavutil      56. 70.100 / 56. 70.100
  libavcodec     58.134.100 / 58.134.100
  libavformat    58. 76.100 / 58. 76.100
  libavdevice    58. 13.100 / 58. 13.100
  libavfilter     7.110.100 /  7.110.100
  libswscale      5.  9.100 /  5.  9.100
  libswresample   3.  9.100 /  3.  9.100
  libpostproc    55.  9.100 / 55.  9.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'output.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.83.100
  Duration: 00:00:14.02, start: 0.000000, bitrate: 797 kb/s
  Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc), 540x960, 662 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    Metadata:
      handler_name    : VideoHandler
      vendor_id       : [0][0][0][0]
  Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
      vendor_id       : [0][0][0][0]
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[Parsed_alphaextract_2 @ 000001a9dae4bdc0] Requested planes not available.
[Parsed_alphaextract_2 @ 000001a9dae4bdc0] Failed to configure input pad on Parsed_alphaextract_2
Error reinitializing filters!
Failed to inject frame into filter network: Invalid argument
Error while processing the decoded data for stream #0:0
[aac @ 000001a9dadd4280] Qavg: 6441.061
[aac @ 000001a9dadd4280] 2 frames left in the queue on closing
Conversion failed!


  


  cmd I'm using to merge video :

  


  - filter_complexe "[2]split=2[color][alpha];[color]crop=iw/2:ih:0:0[color];[alpha]crop=iw/2:ih:iw/2:0[alpha];[color][alpha]alphamerge[ovrly];[0]scale=460:505,setsar=1[0_scaled];[1]scale=460:505,setsar=1[1_scaled];[3][0_scaled]overlay=x=80:y=175[base_img_1];[3][1_scaled]overlay=x=80:y=175[base_img_2];[base_img_1]zoompan=z='if(lte(zoom,1.0),1.2,max(1.001,zoom-0.0006))':d=25*14:s=540x960,fade=out:st=6:d=1:alpha=1,fade=t=in:st=0:d=1[video1];[base_img_2]zoompan=z='if(lte(on,25*6),1,if(lte(zoom,-1.0),1.2,min(zoom+0.0006,1.2)))':d=25*14:s=540x960[video2];[video2][video1]overlay[overlay_video1];[overlay_video1][ovrly]overlay=0:0[base_video];[base_video][4]overlay=enable='between(t,0,7)':x=30:y=30[watermarked_part1];[watermarked_part1][4]overlay=enable='between(t,7,14)':x=(main_w-overlay_w-30):y=(main_h-overlay_h-10)[final_video]"


  


• FFmpeg compiling error(libavfilter/vf_scale_cuda.cu)

  11 août 2021, par Amir Mousavi

  installed packages :

  


  


  libx264 - cuda11.2 - cuda-toolkit - nvidia-driver-465

  


  


  command :

  


  ./configure —enable-nonfree —enable-cuvid —enable-nvenc —enable-cuda-nvcc —enable-libx264 —enable-gpl —extra-cflags=-I/usr/local/cuda/include —extra-ldflags=-L/usr/local/cuda/lib64

  


  here is latest lines errors :

  


  


  libavfilter/vf_scale_cuda.cu(1123) : error : a template argument may not reference a non-external entity

  


  libavfilter/vf_scale_cuda.cu(1123) : error : a template argument may not reference a non-external entity

  


  libavfilter/vf_scale_cuda.cu(1124) : error : a template argument may not reference a non-external entity

  


  libavfilter/vf_scale_cuda.cu(1124) : error : a template argument may not reference a non-external entity

  


  libavfilter/vf_scale_cuda.cu(1124) : error : a template argument may not reference a non-external entity

  


  libavfilter/vf_scale_cuda.cu(1124) : error : a template argument may not reference a non-external entity

  


  Error limit reached.
100 errors detected in the compilation of >"/tmp/tmpxft_000032a1_00000000-7_vf_scale_cuda.cpp1.ii".
Compilation terminated.
ffbuild/common.mak:108 : recipe for target >'libavfilter/vf_scale_cuda.ptx' failed
make : *** [libavfilter/vf_scale_cuda.ptx] Error 4
make : *** Waiting for unfinished jobs....

  


  


  I don't know where is the problem.

  


  lines that error referenced :

  


  EAREST_KERNELS(yuv420p)
NEAREST_KERNELS(nv12)
NEAREST_KERNELS(yuv444p)
NEAREST_KERNELS(p010le)
NEAREST_KERNELS(p016le)
NEAREST_KERNELS(yuv444p16le)


  


• Windows batch with FFmpeg, error handling

  26 mai 2021, par Neel

  first let me apologize as the question might not be clear ! Let me explain, in a folder i have a batch file every time i want to convert 1 or more videos i drop them in the folder and run the batch, this i guess is general scenario for most of the people, additionally i delete the file one by one once the ffmpeg process the file (i.e. within the for loop).

  


  Now the problem is comes when ffmpeg fails to process the file because of an error, but as i am deleting the file i have no way of knowing which files failed, other than manually checking them.

  


  i tried introducing errorlevel in the batch, but that doesn't seem to work with ffmpeg.

  


  if !errorlevel! neq 0 move %%a ..\ProblemFiles


  


  Now my question are :

  


  

  1. Is there an alternative way of achieving the above with ffmpeg i.e.
if error converting move the file.

  


  2. Can i log the error / warning only in case if they occur !

  


  


  Following is the pseudo batch file :

  


  @echo off
echo -------------------------------------------------------------------------------->> ..\Log.txt
echo Batch Started at %time% >> ..\Log.txt
for %%G in (.mp4, .mov) do ( echo %%G
  for /f "delims=" %%a in ('forfiles /s /m *%%G /c "cmd /c echo @relpath"') do (
echo Original file MediaInfo : >> ..\Log.txt
"C:\utils\MediaInfo.exe" --Output=file://"C:\utils\custom.template" "%%a"  >> ..\Log.txt

ffmpeg.exe -y -hide_banner -i "%%a" ...... "..\Output\%%~na_Out.mp4" 

echo Converted file MediaInfo : >> ..\Log.txt
"C:\utils\MediaInfo.exe" --Output=file://"C:\utils\custom.template" "..\Output\%%~na_Out.mp4"  >> ..\Log.txt
timeout 10
echo Deleting File : "%%a" >> ..\Log.txt
del "%%a"
echo ------------------------------------------->> ..\Log.txt
)
)
echo Batch completed at %time% >> ..\Log.txt
echo -------------------------------------------------------------------------------->> ..\Log.txt 


  


  Please assist and thanks in advance !