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Results tagged with vp9
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user 1871
1
vote
Is it possible to encode MP4 video with VP9 codec?
FFmpeg, a command-line app, can write VP9 streams in MP4s.
Get a static daily/snapshot binary from https://ffmpeg.zeranoe.com/builds/
Basic command is
ffmpeg -i in.mov -c:v vp9 out.mov …
- 33.8k
0
votes
Accepted
Is it possible to use 2-pass encoding to create vp9 / webm videos from an image sequence?
You would use
ffmpeg -framerate 30 -f image2 -i frames/%04d.png -pass 1 -c:v libvpx-vp9 -pix_fmt yuva420p -b:v 0 -tile-columns 2 -crf 18 -r 30 -g 300 -y -f null -
and then
ffmpeg -framerate 30 -f image2 … -i frames/%04d.png -i my_audio.flac -pass 2 -c:v libvpx-vp9 -pix_fmt yuva420p -b:v 0 -tile-columns 2 -crf 18 -c:a libopus -b:a 128k -r 30 -g 300 -y my_video.webm
In FFmpeg the container format or encoding …
- 33.8k
0
votes
Accepted
Encoding: Insert keyframes at certain positions
Is there a simpler option using -force_key_frames? Unfortunately, this option only seems to allow inserting key_frames using an interval
Not so. To force keyframes for frames 45, 99 and 154 where fir …
- 33.8k
3
votes
Accepted
Create Alpha channel-Videos (obs stinger compatible) with ffmpeg and 2 files
The alphaextract/alphamerge filters are meant for this.
Since your alpha reference is already greyscale, we only need the alphamerge filter
ffmpeg -i main.mp4 -i alpha.mp4 -filter_complex [0][1]alph …
- 33.8k
2
votes
Accepted
What are the WebM (VP9+opus) encoding settings compatible for YouTube import for a video wit...
Rather than framerate, the issue is there's only one frame. You'll have to loop the image.
ffmpeg -i Audio.opus -loop 1 -i image.png -pix_fmt yuv420p -ac 2 -s 640x360 -strict strict -r pal -shortest …
- 33.8k
4
votes
Accepted
Is it safe to use the yuva420 pix_format option with ffmpeg to encode webm videos?
YUV color encoding with 4:2:0 chroma subsampling is the only widely safe pixel format for web playback, although for certain codecs, other pixel formats may be supported.
FFmpeg auto-selects the pixe …
- 33.8k