![]() ![]() ffmpeg -i file001.mp4 -fflags +genpts file001-new.mp4Ĭreate a text file and put in the name of each rendered file like this file 'file000-new.mp4'Īnd run ffmpeg -f concat -i textfile -c copy -fflags +genpts recording-encoded. Because of how the segmenter works - it only cuts at I-frames - these files won't be exactly n seconds long and the video part may not play properly, but the data's all there and you can convert each of the parts e.g. This should create file000.mp4, file001.mp4 and so on. This isn't a true pause/resume facility but the piecemeal division will allow you to have a break from encoding.Ī rough overview of the commands to issue: Break the fullfile into parts ffmpeg -i recording.mp4 -c copy -flags +global_header -segment_time n -f segment file%03d.mp4 There is currently no native decoder, so libcodec2 must be used for decoding. I would suggest segmenting the source file, encoding the segments and then stitching the resultant files. FFmpeg can make use of the codec2 library for codec2 decoding and encoding. This instructs ffmpeg to use MPEG-2 video encoding. ffmpeg -y -vsync 0 -hwaccel cuda -hwacceloutputformat cuda -i original.mp4 -vf 'scalenppformatyuv420p,transposenppclock,scalenpp1280:720:interpalgosuper:forceoriginalaspectratiodecrease,hwdownload,padwidth1280:height720,hwupload' -c:a copy -c:v h264nvenc -preset p6 -rc-lookahead 20 -b:v 5M out. ![]() I am struggling with use of a CPU based filter - the following works fine: ffmpeg -y -vsync 0 -hwaccel cuda -hwacceloutputformat cuda -i original.mp4 -vf 'scalenppformatyuv420p,transposenppclock,scalenpp1280:720:interpalgosuper:forceoriginalaspectratiodecrease. Let’s go through the various options to control the video encoding. It didn't seem possible as of Sep 30 2015. I’m performing a transcoding on home videos for device support using ffmpeg - trying to make the best use of my GPU.
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