![]() I've tried to use -vf "atempo=0.8", but that makes the audio sound weird.Įdit: The output video stream is 24/1.001 fps not 23.98 fps. ![]() The output files sounds fine at first for the first few minutes, but after around 10 minutes it starts to get out of sync. ![]() This is the av1an script I'm using:Īv1an -verbose -temp="tempfolder" -sc-pix-format=yuv420p10le -min-scene-len=12 -encoder=aom -workers=3 -chunk-method=lsmash -concat=mkvmerge -pix-format=yuv420p10le -passes=2 -ffmpeg="-vf "fieldmatch,deblock=filter=strong:block=4,deband=range=8,unsharp=la=0.3,decimate,dedot=tc=0.85,deflicker"" -video-params="-width=720 -height=480 -cq-level=29 -passes=2 -threads=3 -cpu-used=3 -end-usage=q -kf-max-dist=240 -kf-min-dist=12 -lag-in-frames=48 -enable-fwd-kf=1 -frame-boost=1 -sharpness=1 -arnr-strength=0 -auto-alt-ref=1 -denoise-noise-level=8 -denoise-block-size=16 -enable-dnl-denoising=1 -tune-content=animation -tune=image_perceptual_quality -sb-size=64 -tile-columns=2 -tile-rows=1" -i "infile.mkv" -o "outfile.mkv" My input file uses ffv1 for the video codec and ac3 for the audio inside a Matroska container. Step 1: Convert to MTS format ffmpeg -i clip.flv -q 0 clip.MTS ffmpeg -i intro.mp4 -q 0 intro.MTS Step 2: Concat clip.MTS and intro.MTS ffmpeg -f concat -i filesToSync.txt -c copy out. is there any parameter that will automaticly remove this part or ignores audio track if source doesnt have any audio track at all. if I remove 0:a1:a2:a3:aconcatn4:v0:a1outa part it fixes the problem but I need to analyse file before using the command. I'm on Windows 10 and I'm trying to remove extra frames by using the ffmpeg decimate filter (from 29.97 to 23.98). But if source file doesn't have audio track, this command fails.
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