[FFmpeg-user] Sending 2 camera outputs side by side to loopback device

I am on Ubuntu 22.04 and trying to combine 2 cameras into one stream that is being sent to a loopback device. The command appears to work but I can't see the stream in any way. I've tried VLC Cheese ffplay guvcview and none of them work. The command I am using is : *ffmpeg -f v4l2 -vcodec rawvideo

Re: [FFmpeg-user] Sending 2 camera outputs side by side to loopback device

Thanks for the reply. I just rebooted my computer and tried again. There must have been some locked up process that wasn't allowing me to see the loopback device as it now works. On Fri, Nov 25, 2022 at 2:56 AM Michael Koch wrote: > Am 25.11.2022 um 08:02 schrieb Jim Ruxton: > >

[FFmpeg-user] Captured Audio Stream and Video Streams from YouTube Live are out of Sync

I am trying to retrieve a YoutubeLive stream and send the video stream to a video loopback device and the audio to my souncard. This works however it appears that the audio is delayed by a second or so. Is there a better way to do this so they aren't out of sync or failing that is there a way t

Re: [FFmpeg-user] Captured Audio Stream and Video Streams from YouTube Live are out of Sync

Thanks Carl, Am 09.05.2020 um 09:14 schrieb Jim Ruxton : I am trying to retrieve a YoutubeLive stream and send the video stream to a video loopback device and the audio to my souncard. This works however it appears that the audio is delayed by a second or so. Is there a better way to do

Re: [FFmpeg-user] Captured Audio Stream and Video Streams from YouTube Live are out of Sync

8 Uhr schrieb Jim Ruxton : ffmpeg does not completely support your use case, it should work with ffplay. Are you saying I could use ffplay in a similar way to split the audio and video from the stream but keep them in sync? No I just wanted to highlight that ffmpeg -i input -f alsa default -f

[FFmpeg-user] Sending ffmpeg output to virtual usb uvc device in Linux

I am wondering if there is a way to send ffmpeg output of a stream to a virtual usb device. I am using a videoloopback device now. I thought I could use something like this https://github.com/wlhe/uvc-gadget to be able to convert the dummy video device to make it look like a webcam but I haven'

Re: [FFmpeg-user] Sending ffmpeg output to virtual usb uvc device in Linux

peated 1 times frame=   98 fps= 27 q=-0.0 Lsize=N/A time=00:00:03.58 bitrate=N/A speed=0.998x video:132300kB audio:672kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown Exiting normally, received signal 2. On 2020-05-14 7:43 p.m., Jim Ruxton wrote: I am wondering if ther

[FFmpeg-user] Getting alsa xruns when sending video to v4l2 device and alsa

Is there a way that I can avoid getting alsa buffer xruns when using the following command to send a video to a v4l2 device and sound out to alsa. ffmpeg -re -i VideoInput.m4v -map 0:v -pix_fmt yuyv422 -f v4l2 /dev/video0 -f alsa default I tried sending sound to pulse instead as below which a

Re: [FFmpeg-user] Trying to understand ffmpeg cpu usage in this case of capturing rtsp streams

> > > On Sat, Nov 9, 2024 at 2:12 PM Ferdi Scholten wrote: > >> >> >> On 09-11-2024 19:31, Moritz Barsnick via ffmpeg-user wrote: >> > On Sat, Nov 09, 2024 at 13:11:56 -0500, Jim Ruxton wrote: >> >> "apt-list ffmpeg" shows the version

Re: [FFmpeg-user] Trying to understand ffmpeg cpu usage in this case of capturing rtsp streams

> > >> >> On Sat, Nov 9, 2024 at 2:12 PM Ferdi Scholten wrote: >> >>> >>> >>> On 09-11-2024 19:31, Moritz Barsnick via ffmpeg-user wrote: >>> > On Sat, Nov 09, 2024 at 13:11:56 -0500, Jim Ruxton wrote: >>> >> "ap

[FFmpeg-user] Trying to understand ffmpeg cpu usage in this case of capturing rtsp streams

I'm using Ubuntu 22.04 and ffmpeg version 4.4.2-0 I'm capturing 3 rtsp streams as shown at the bottom . Stream A resolution is 1600x1200 Stream B and Stream C resolution is 384x192 . Stream A and B are coming from one device (ip address) and Stream C is coming from a second device (ip address) Wh

Re: [FFmpeg-user] Trying to understand ffmpeg cpu usage in this case of capturing rtsp streams

On Sat, Nov 9, 2024 at 10:56 AM Carl Zwanzig wrote: > Please do not top-post on this list. > > On 11/8/2024 3:46 PM, Jim Ruxton wrote: > > Thanks so much for the help. Not sure why but when I try to upgrade > ffmpeg > > using the ppa as you suggested I get: > > &g

Re: [FFmpeg-user] Trying to understand ffmpeg cpu usage in this case of capturing rtsp streams

Thanks so much for the help. Not sure why but when I try to upgrade ffmpeg using the ppa as you suggested I get: ffmpeg is already the newest version (7:4.4.2-0ubuntu0.22.04.1+esm5). however if I check with "ffmpeg -version " I get : ffmpeg version 4.4.2-0ubuntu0.22.04.1+esm5 Copyright (c) 2000-

Re: [FFmpeg-user] Trying to understand ffmpeg cpu usage in this case of capturing rtsp streams

On Sat, Nov 9, 2024 at 2:12 PM Ferdi Scholten wrote: > > > On 09-11-2024 19:31, Moritz Barsnick via ffmpeg-user wrote: > > On Sat, Nov 09, 2024 at 13:11:56 -0500, Jim Ruxton wrote: > >> "apt-list ffmpeg" shows the version 7 package is installed >

Re: [FFmpeg-user] Trying to understand ffmpeg cpu usage in this case of capturing rtsp streams

When I do an apt update the ppa shows up in my source list ie. Hit:25 https://ppa.launchpadcontent.net/ubuntuhandbook1/ffmpeg7/ubuntu jammy InRelease Could it be that ffmpeg -version is just dropping the 7 from the front of the version output? On Sat, Nov 9, 2024 at 10:07 AM Ferdi Sch