181–190 of 210 posts
If you want to know a bit more about what is important in this major release, you can watch my presentation about FFmpeg 6.0 at Fosdem: https://fosdem.org/2023/schedule/event/om_vlc/ (Video + Slides) It’s a bit less dry than the changelog, notably for the evolutions of the APIs. What’s also important is the changes about the release schedule that we’ve been pushing with the community. Major version every year at the…
I love ffmpeg, a single command of `ffmpeg -ss 01:15:42 -to 01:16:00 -i example.mp4 -c copy output.mp4` will let you create a video clip at a certain point in time from a larger video without decoding/encoding it. I wrote a blog post and made a demo video the other day going over using this feature at: https://nickjanetakis.com/blog/create-video-clips-with-ffmpe...
in this case, it is important to be aware that the times you specify may not be extracted exactly. it will be off by a few frames based on keyframe availability. the only way to extract exact frames is to re-encode. :)
Do any of you know if this has Dolby AC-4 support? Ticket 8349 [1] has been open for years to add this, but it's not there yet. This would be very nice so we can watch ATSC 3.0 OTA broadcasts via FFmpeg-based things like Plex. (Currently if one uses something like a SiliconDust HDHomeRun, viewing an ATSC 3.0 stream requires using their app/player, which uses a SiliconDust cloud service to do the decoding. It'd be rea…
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I am still using 4.2. Does it make any difference if all I care about is h264 and hevc?
At a prior job we pinned to 4.2.3 because after that version an internal change massively impacted high frame rates. With a 1080p mp4 file on disk, and that disc being an ssd, version 4.2.3 delivers 700-800 frames per second, while all the versions after that 4.2.3 release - no other app or library changes - that same file may reach 300 fps. I spent some time trying to find the cause of that 50% cut in efficiency, bu…
ffmpeg is my go-to re-encoder. I didn't know ffprobe existed until I read some "howto" and its also increadibly useful as a way to get fundamental video and audio stream data out as e.g. csv or json. So I can run an ffprobe script to get x,y info out, decide if the video needs re-encoding, pass to an ffmpeg call which does fast or veryfast settings to reset the x/y scale (for instance) It's also unquestionably 'self…
My app extracts screenshots from videos to create a beautiful gallery of videos. But even though I include FFmpeg already, I need a 50mb FFprobe executable to be bundled with my app just so that I can determine the width, height, duration, and fps of a video file!
What is it that FFprobe does that FFmpeg couldn't do with a few extra pieces of exposed API?
https://videohubapp.com/ - https://github.com/whyboris/Video-Hub-App
https://github.com/whyboris/Video-Hub-App/blob/772b25bbd4b41...
If you want to know a bit more about what is important in this major release, you can watch my presentation about FFmpeg 6.0 at Fosdem: https://fosdem.org/2023/schedule/event/om_vlc/ (Video + Slides) It’s a bit less dry than the changelog, notably for the evolutions of the APIs. What’s also important is the changes about the release schedule that we’ve been pushing with the community. Major version every year at the…
A bit off topic, but in your talk you said that intel, nvidia and amd encoder are worse than svt-av1. How much worse and which card is the best? Always encoding with ab-av1/av1an using svt-av1, but with the "right" preset it's still really slow. Which hardware encoder (in your opinion/experience) is the best to use (size/quality speed doesn't matter as much). If I want to convert my media server to av1 only should I…
For example if you pick speed 6 on SVT-AV1 it should take about as much time as x264 veryslow while still being 30-40% lower bitrate at the same quality.
Have you tried the faster presets of SVT-AV1?
Isn’t there a language for configuring ffmpeg to make it do different things?
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We probably should have a Fabrice Bellard accomplishments auto-comment on HN that starts by "Did you know…?" on those submissions.
If we studied Fabrice from the perspective of "how can all be more like him/as productive as him/as innovative/as smart", do you think the findings would basically come back "he's just genetically gifted"? He's like the Lebron James of the tech world from what I can deduct.