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  • How do I set up and use FFmpeg in Windows?
    To update FFmpeg, just revisit the download page in step 1 above and download the zip file Unpack the files and copy them over the old files in the folder you created in step 2 Using FFmpeg Using FFmpeg requires that you open a command prompt window, then type FFmpeg specific commands Here is a typical FFmpeg command:
  • video - Where can I learn ffmpeg? - Stack Overflow
    #ffmpeg IRC channel on Freenode; ffmpeg-user mailing list for help using the command-line tools (ffmpeg, ffprobe, ffplay) libav-user mailing list for help using the libraries (libavcodec, libavformat, etc) Development See FFmpeg Developer Documentation, hang out in the #ffmpeg-devel IRC channel, and subscribe to the ffmpeg-devel mailing list
  • Vertically or horizontally stack (mosaic) several videos using ffmpeg . . .
    ffmpeg -i input0 -i input1 -filter_complex vstack=inputs=2 output Videos must have the same width Horizontal Using the hstack filter ffmpeg -i input0 -i input1 -filter_complex hstack=inputs=2 output Videos must have the same height With a border Using the pad filter This examples creates a 5px black border between the two sides
  • Using ffmpeg to change framerate - Stack Overflow
    ffmpeg -y -i seeing_noaudio mp4 -filter:v "setpts=1 25*PTS" seeing mp4 Which changes the duration but not the framerate Surely I should be able to do this with a single ffmpeg command without having to reencode or even as some people suggested going back to the original raw frames
  • Fix bad files and streams with ffmpeg so VLC and other players would . . .
    I've tested lot of solutions and software I love cli commands, so using ffmpeg you can fix your video file with no hassle Try the next command if you came here searching some useful fix: ffmpeg -vcodec mpeg4 -b:v 7561k -qscale:v 2 -acodec aac -ac 2 -async 1 -strict experimental video_fixed mp4 -threads 0 -i damage_file mp4 Good luck 😃!
  • Cutting multimedia files based on start and end time using ffmpeg . . .
    ffmpeg -i movie mp4 -ss 00:00:03 -t 00:00:08 -async 1 cut mp4 When re-encoding you may also wish to include additional quality-related options or a particular AAC encoder For details, see ffmpeg's x264 Encoding Guide for video and AAC Encoding Guide for audio Also, the -t option specifies a duration, not an end time The above command will
  • FFmpeg - Change resolution of the video with aspect ratio
    If I will run ffmpeg with -s 100x200, then second video will have bad aspect ratio How can I limit output video by width, with auto aspect ratio by height? For example, I want specify for the output video only width 100px and ffmpeg must automatically calculate height with right aspect ratio
  • Change video resolution ffmpeg - Stack Overflow
    @Sodj Here is the answer: ffmpeg -i input avi -filter:v scale=720:-1 -c:a copy output mkv The -1 will tell ffmpeg to automatically choose the correct height in relation to the provided width to preserve the aspect ratio -1 can also be used for width if you provide a given height Also there is a useful discussion there –
  • Fastest way to extract frames using ffmpeg? - Stack Overflow
    time ffmpeg -i input mp4 -filter:v fps=fps=1 60 ffmpeg_%0d bmp 1m36 029s This takes long because ffmpeg parses the entire video file to get the desired frames
  • How to stream with ffmpeg via http protocol - Stack Overflow
    To have FFmpeg act as an HTTP server, you need to pass the -listen 1 option Additionally, -f mp4 will result in a non-fragmented MP4, which is not suitable for streaming You can get a fragmented MP4 with -movflags frag_keyframe+empty_moov





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