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How can I capture audio AND video simultenaous with …
https://stackoverflow.com/questions/6311560/how-can-i-capture-audio-and-video-simultenaous-with-ffmpeg-from-a-linux-usb-capt
ffmpeg -f alsa -ac 2 -i hw:1,0 -f video4linux2 -i /dev/video0 -acodec ac3 -ab \ 128k -f matroska -s 1280x720 -vcodec libx264 -preset ultrafast -qp 16 testsize.mkv Share Improve this answer
FFmpeg Devices Documentation
https://ffmpeg.org/ffmpeg-devices.html
Audio sample rate is always 48 kHz and the number of channels can be 2, 8 or 16. Note that all audio channels are bundled in one single audio track. 3.5.1 Options list_devices. If set to true, print a list of devices and exit. Defaults to false. This option is deprecated, please use the -sources option of ffmpeg to list the available input devices.
#2410 (ffmpeg down with video4linux2.) – FFmpeg
https://ffmpeg.org/trac/ffmpeg/ticket/2410
then I run again the commandline in step 2, ffmpeg work with stk1160 driver. ffmpeg -loglevel 99 -f video4linux2 -i /dev/video0 -vcodec mpeg4 -b 1200k -y test.avi. Splitting the commandline. Reading option '-loglevel' ... matched as option 'loglevel' (set …
python - FFmpeg and video4linux2 parameters - how to ...
https://stackoverflow.com/questions/68734375/ffmpeg-and-video4linux2-parameters-how-to-capture-still-images-faster
I am using FFMPEG and video4linux2 command line options to capture each image within a loop of all the cameras as shown below. Expected results. I just want a single frame from each camera. The frame rate is 30 fps, so I was expecting that capture time would be on the order of 1/30th to 1/10th of a second worst case.
Audio is not in sync with video, webcam capturing - …
https://ffmpeg.org/trac/ffmpeg/ticket/692
ffmpeg -f alsa -ar 44100 -ac 1 -i front:CARD=U0x46d0x809,DEV=0 -f video4linux2 -r 25 -s vga -i /dev/video0 -vcodec libx264 -preset fast -crf 20 -acodec libaacplus -ab 32k -f mpegts udp://burek:10001 produces such a stream that AUDIO is late (video comes before audio), and this command (just swapped a/v inputs):
Recording audio with FFMPEG works in terminal but not ...
https://stackoverflow.com/questions/18125864/recording-audio-with-ffmpeg-works-in-terminal-but-not-through-exec-of-php
I use this command to RECORD audio and video from my webcam in terminal and it works! ffmpeg -f video4linux2 -r 25 -sameq -s 640x480 -i /dev/video0 -f alsa -i plughw:0,0 -ar 22050 -ab 128k -y webcam.flv. But when I do it through PHP, like this:
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