[FFmpeg-user] Blinking red

Hi there, Tried to make a screen cast this morning, but the result is flashing red? https://s.natalian.org/2022-01-06/vscode-span.mp4 https://s.natalian.org/2022-01-06/vscode-span.log Any ideas what I am doing wrong? Thank you in advance, ___

[FFmpeg-user] Screen cast audio is not in sync

Hi there, How do I prevent my audio going out of sync with my screen capture please? https://s.natalian.org/2021-02-22/update-chart.log https://s.natalian.org/2021-02-22/update-chart.mp4 Perhaps it's an issue with my USB microphone?

[FFmpeg-user] Works in ffmpeg-git, doesn't in ffmpeg 1:4.2.2-5

For several months as an Archlinux user, kms screen capture has been broken in the standard ffmpeg package. [h264_vaapi @ 0x55f36423d5c0] Pick nothing to encode next - need more input for reference pictures. [hwmap @ 0x55f364244000] Filter input: drm_prime, 2560x1440 (60557866).

Re: [FFmpeg-user] Archlinux update breaks kmsgrab: Failed to get plane resources: Permission denied

Hi, Just to follow up, I think I have it working again and the permission errors have fallen away with 5.5.2-arch1-1 and perhaps some other package update. After much back and forth it would appear the `-crtc_id 48` was causing the initial issue with vaapi_device /dev/dri/renderD128. [kmsgrab

Re: [FFmpeg-user] Archlinux update breaks kmsgrab: Failed to get plane resources: Permission denied

Replying to https://ffmpeg.org/pipermail/ffmpeg-user/2020-February/046699.html Didn't manage to configure mailman correctly to just send replies to my email post. I created another "Capture the screen from the first active KMS plane" [1] without the hide banner switch. 1.

[FFmpeg-user] Archlinux update breaks kmsgrab: Failed to get plane resources: Permission denied

Hi there, For sometime I've been happily using kmsgrab to make screencasts on my Archlinux Xorg desktop. https://github.com/kaihendry/recordmydesktop2.0/blob/9825a44d886318d78463c0a602681c0c7931cf83/x11capture#L71 But then it broke after a reboot as described here:

Re: [FFmpeg-user] kmsgrab on Intel 8th generation aka h/w accelerated screen capture

Thanks for the sudo setcap cap_sys_admin+ep /path/to/ffmpeg tip. It indeed works. https://github.com/kaihendry/recordmydesktop2.0/commits/kms Unfortunately kmsgrab seems to lag for me: https://s.natalian.org/2018-06-26/1529976937.mp4 And sometimes is unreliable:

Re: [FFmpeg-user] kmsgrab on Intel 8th generation aka h/w accelerated screen capture

On Mon, 25 Jun 2018 at 09:49, robertlazarski wrote: > That command worked for me though of course without your external dep. You managed to record sound with your kmsgrab? Not sure what you mean by external dep! ___ ffmpeg-user mailing list

[FFmpeg-user] kmsgrab on Intel 8th generation aka h/w accelerated screen capture

Hi ffmpeg users, Sorry I initially posted my question here: https://www.reddit.com/r/ffmpeg/comments/8tgejw/kmsgrab_on_intel_8th_generation_aka_hw/ Via https://trac.ffmpeg.org/wiki/Hardware/VAAPI#ScreenCapture I discovered kmsgrab which astonishingly doesn't seem to drop frames or over heat my

Re: [FFmpeg-user] h264_vaapi missing frames

Actually I spoke too soon. It's definitely dropping frames still. For example. https://s.natalian.org/2018-03-28/1522205981.mp4.log https://s.natalian.org/2018-03-28/1522205981.mp4 ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org

Re: [FFmpeg-user] h264_vaapi missing frames

On 23 March 2018 at 21:12, Mark Thompson wrote: > This is still duplicating a very large number of frames for video sync. As > suggested previously, please try with video sync disabled ("-vsync 0") or > without audio. https://s.natalian.org/2018-03-25/vsync.mp4.log

Re: [FFmpeg-user] h264_vaapi missing frames

On 23 March 2018 at 14:06, Erik Dobberkau wrote: > If you only capture a fraction of the frames your device is actually > producing without motion blending, isn't that to be expected? A fraction of the frames? I should iiuc be capturing at 30 fps. I am not quite sure

Re: [FFmpeg-user] h264_vaapi missing frames

Thank you Moritz! Damn, I feel like a fool. ;) Unfortunately Mark's suggestion doesn't seem to have an impact. As you hopefully can see here: https://s.natalian.org/2018-03-23/1521768226.mp4 The mouse still doesn't move smoothy across the screen. Hence I feel it's dropping frames!

Re: [FFmpeg-user] h264_vaapi missing frames

On 21 March 2018 at 19:17, Mark Thompson wrote: > If that doesn't work then I suggest reducing the test case to find which > parts are causing the problem - e.g. try without audio, using libx264 instead > of VAAPI, without extra video sync ("-vsync 0"). Thanks! Will give it a

Re: [FFmpeg-user] h264_vaapi missing frames

Hi Mark, On 20 March 2018 at 17:58, Mark Thompson wrote: > Show your command line? The pts values in that file are quite uniform, > suggesting that you've forced the output to be treated as if it is 30/1001 > fps even if it isn't. The status line also says "frame= 529 ...

Re: [FFmpeg-user] h264_vaapi missing frames

Thanks Dennis for the suggestion! On 20 March 2018 at 10:54, Dennis Mungai wrote: > Have you tried using the restream option? > ffmpeg -re -i capture_device -vaapi_device /dev/dri/renderD128 > -movflags +faststart > -vf 'format=nv12|vaapi,hwupload' -c:v h264_vaapi

[FFmpeg-user] h264_vaapi missing frames

Hi there, With my brand new Intel 8th gen laptop (Intel Corporation UHD Graphics 620 (rev 07) with 8 core Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz on Archlinux, I thought I'd experiment with hardware accelerated capture as opposed to my normal 2-step approach of 1) recording to mkv

Re: [FFmpeg-user] Transcoding foscam mkv to mp4 is resulting in larger files

On 13 September 2015 at 12:24, Steve Boyer wrote: > Put the "-c:a copy -c:v copy" to copy the streams and not transcode and it > worked fast (778 fps) and plays fine with ffplay and VLC. MPlayer plays it > at an insane FPS. Stats on the resulting file: Thanks Steve, I

[FFmpeg-user] Transcoding foscam mkv to mp4 is resulting in larger files

Hi guys, The Input #0, mpeg transcoding into mp4 (for iPhone playback via Safari) is resulting in up 3x larger files. Why is that? ffprobe of a typical MKV input file: http://ix.io/kLm The ffmpeg log: http://ix.io/kMw Sidenote: Found I had to put in a frame rate of 30 else things wouldn't

Re: [FFmpeg-user] HLS one liner from /dev/videoX

On 30 April 2015 at 17:21, Tom Evans tevans...@googlemail.com wrote: What is missing (and the only thing that is really required) is the full command line that you used to invoke ffmpeg, and the console output that invocation of ffmpeg produced, presented as inline in the email. No

Re: [FFmpeg-user] FFMPEG compatible hardware?

On 13 March 2015 at 16:53, Moritz Barsnick barsn...@gmx.net wrote: HDMI inputs. Here's one I randomly picked from their website (well, it looked like the smallest one with HDMI input): https://www.blackmagicdesign.com/products/decklink/techspecs/W-DLK-06 Ah, didn't know about these. But since

Re: [FFmpeg-user] ffvhuff mkv playback issues and odd coloured artefacts

On 4 March 2015 at 18:15, Christoph Gerstbauer christophgerstba...@gmail.com wrote: which -pix_fmt (pixelformat) does your recorded ffvhuff have? I cant see a syntax setting for the pixel format in your video. I didn't have one defined