I have done writing the ffmpeg code and related java code what I'm doing is to send byte to native code and get the output in other byte but I'm always getting output buffer zero in my native code. But it doesn't seem that important as far as I can tell.I need to resize the camera preview frame using ffmpeg. croptop - Remove croptop rows of pixels from the top of the frame. height - New height of the frame (must be an even number). Impossible to convert between the formats supported by the filter 'Parsed_scale_npp_0' and the filter 'auto_scaler_0' Error reinitializing filters! Failed to inject frame into filter network: Function not implemented Error while processing the decoded data for stream #0:0 Conversion failed!Īlso there's things like hardware upload and download which I can't figure out. (Cropping is built into ffmpeg resizing so Im providing it here for completeness.) width - New width of the frame (must be an even number). This code ffmpeg -y -hwaccel cuvid -i INPUT c:a copy -c:v hevc_nvenc -vf "scale_npp=w=1920:h:-1:format=yuv420p:force_original_aspect_ratio=decrease,pad=1920:1080:(ow-iw)/2:(oh-ih)/2" OUTPUT This code can't leave the video as it is if it's smaller than FHD.
I'm not sure if I'm going to have problems using -hwaccel cuvid and nvenc but it seems to work fine. (Cropping is built into ffmpeg resizing so I'm providing it here for completeness.) width - New width of the frame (must be an even number). ffmpeg -y -hwaccel cuvid -i INPUT -c:a copy -c:v hevc_nvenc -vf "scale_npp=1920:1080" OUTPUT I want to use something like this -filter:v "scale='min(1920,iw)':min'(1080,ih)':force_original_aspect_ratio=decrease,pad=1920:1080:(ow-iw)/2:(oh-ih)/2"īut I've only gotten a very limited version of it to work. I have a 1070 with a recently compiled version of ffmpeg with just about everything enabled. (Not sure about OpenCL but it probably can) To resize a video using FFMpeg.exe, here is the command-line syntax to use: ffmpeg -i 'D:VideosHP Chromebook 14 Review.mp4' -vf scale424:240 'D:VideosHP Chromebook 14 Review. Once done, type in the output file name and click the Start Encode button.
I'm aware that Scale_Cuda, Scale_NPP and Vulkan that can do this. Optionally, you can adjust the video frame rate and other settings in the Video tab. Using FFMPEG with Python tutorialThis video will teach how you can pre-process your video by trimming, resizing or changing FPS using FFMPEG, which can be al. Software filters take forever, and since my encodes use nvenc anyway I thought I might as well give gpu resizing a shot.
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