llyyr
commented
7 months ago Bisected to https://github.com/ffmpeg/ffmpeg/commit/d9e41ead82263e96ebd14d4d88d6e7f858dd944c
You'll probably need to report this to ffmpeg
Open twilson90 opened 7 months ago
llyyr
commented
7 months ago Bisected to https://github.com/ffmpeg/ffmpeg/commit/d9e41ead82263e96ebd14d4d88d6e7f858dd944c
You'll probably need to report this to ffmpeg
Important Information
Difficult one to describe but I'll do my best.
On an old version of mpv I've been using (built in late 2021) I could run the following command and I would see a 1280x720 window with a frame rate of 30fps, displaying a still image (image.png) for 10 seconds before ending:
mpv --lavfi-complex="color=c=#000000:s=1280x720:r=30[bg1];[bg1][vid1]scale2ref=w=oh*mdar:h=ih[bg2][img1];[bg2][img1]overlay=x=(main_w-overlay_w)/2:y=(main_h-overlay_h)/2[vo];anullsrc=cl=stereo:r=48000[ao]" --end=10 "image.png"On a build from the latest source however, when I ran the same command I see nothing, it just hangs and apparently no frames are generated. Interestingly, if I omit
anullsrc=cl=stereo:r=48000[ao]from the command I see a single frame of the still image flash before closing, and the warning:[lavfi] Filter is stuck. This is a FFmpeg bug. Treating as EOF.The idea behind the lavfi-complex filter is to create a dummy base frame rate and background, on which a still image can be layered ontop. The anullsrc is necessary so an audio track is generated.
This is so I can generate an item in a playlist that consists of an image (and optionally audio) that outputs a video and audio track in encoding mode (using the --o parameter), and I can have it display for a set amount of time before moving onto the next playlist item, and the encoding will run seamlessly.
So it appears something has changed (probably in ffmpeg as the warning suggests) that makes this method no longer work.
Any ideas how to get the old behaviour back?
EDIT: After simplifying the command further, I'm noticing it's all going wrong due to the scale2ref filter... Not sure why... a bug? If I remove the scale2ref I can get it working but then the image is not scaled to fit the window.
Log file
log.txt