ChanServ changed the topic of #ffmpeg to: Welcome to the FFmpeg USER support channel | Development channel: #ffmpeg-devel | Bug reports: https://ffmpeg.org/bugreports.html | Wiki: https://trac.ffmpeg.org/ | This channel is publically logged | FFmpeg 7.1.1 is released
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<Glanzmann>
Btw. webm also appears to work everywhere but has bigger size than h264/yuv420p.
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<CounterPillow>
this statement makes no sense
<CounterPillow>
webm is a container, or rather a subset thereof. h264 is a video codec. yuv420p is a pixel format. Size comparisons need to be at iso quality.
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<Glanzmann>
CounterPillow: I meant webm/vp9 as in: fmpeg -y -i VID_20250712_original.mp4 -c:v libvpx-vp9 -vf scale=1280:720 -preset veryslow VID_20250712.webm
<Glanzmann>
furq: What would be a fairer comparison?
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<linkmauve>
Glanzmann, also your vainfo reports you can hardware decode all of H.264, HEVC, VP9 and AV1.
<linkmauve>
So that wouldn’t be your issue on Linux.
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<apteryx>
hello! I've built ffmpeg 7.1.1 with vulkan support, but using `ffmplay -hwaccel vaapi -i path/to/any/h264.mp4` crashes the GPU driver, with dmesg output: https://paste.debian.net/1385698/
<apteryx>
Should I report this to ffmpeg/and or mesa?
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<linkmauve>
apteryx, vaapi is a different API from vulkan, but yes it seems sensible to report such a crash.
<linkmauve>
Most likely to mesa, they will triage it if it happens to be a kernel bug.
<apteryx>
yeah, but vaapi ends up printing something about using the vulkan renderer of SDL, I think