Questions tagged [vp9]

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1answer
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Convert mp4 to webm without quality loss with ffmpeg

What is the best way to convert a mp4 file to webm without quality loss (using vp8 or vp9) with ffmpeg? If I do ffmpeg -i in.mp4 out.webm the quality is very bad. I can specify a target bitrate via -...
2
votes
0answers
82 views

Video codec for progressive enhancement

JPEG has a progressive enhancement mode where a full frame can be downloaded quickly at low quality, and then the quality enhanced as the file is continually loaded. (Example image from http://...
1
vote
0answers
33 views

ffmpeg vp9 encoding settings to produce “yuv420p(tv, progressive)”

I have a webm video that was made (from an h264) using AWS Elastic Transcoder, using the "System preset: Webm VP9 720p" preset. For this file, ffprobe gives: $ ffprobe converted-mp4.webm <snip&...
1
vote
0answers
115 views

Chrome renders WebM Video “darker” than other browsers / media players

Not sure if this is the correct community, but I have a question about video encoding and decoding. I have a video that gets served in MP4 or WebM formats, depending on browser support. I noticed ...
0
votes
1answer
212 views

Fast VP9 still image encoding

I use this command to create "myFile.webm", a VP9 video with one still image : $ ffmpeg -i myOriginialPureAudioFile.opus -loop 1 -i myAudioFile_640x360.png -shortest -threads 4 -speed max -c:a copy ...