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--- computing:linux:video_capture [2019/03/31 14:11]
gcooper
+++ computing:linux:video_capture [2019/04/01 21:13] (current)
gcooper
@@ Line 28: / Line 28: @@
   * USB video capture device is ''/dev/video0''
   * USB audio capture device is number 1 ''hw:1,0''
+  * Captured and encoded in one go
+  * Small resultant file size
 <file>
-ffmpeg -f v4l2 -standard NTSC -thread_queue_size 512 -i /dev/video0 -f alsa -thread_queue_size 512 -i hw:1,0 -vcodec libx264 -preset superfast -crf 25 -s 720x576 -r 25 -aspect 4:3 -acodec libmp3lame -b:a 128k -channels 2 -ar 48000 out.avi
+ffmpeg -f v4l2 -standard NTSC -thread_queue_size 512 -i /dev/video0 -f alsa -thread_queue_size 512 -i hw:1,0 -vcodec libx264 -preset superfast -crf 25 -s 720x576 -r 25 -aspect 4:3 -acodec libmp3lame -b:a 128k -channels 2 -ar 48000 yourvideo.mp4
 </file>
+<file>
+ffmpeg -i input -vf "yadif=1:1,hqdn3d=3,drawbox=y=ih-h:w=0:h=6:t=max,format=yuv420p" -crf 23 -preset medium -c:a aac -movflags +faststart -metadata title="Title" output.mp4
+</file>
+===== Trim a Video Without Encoding =====
+  * ''-ss 00:00:10'' trim 10 seconds from beginning
+  * ''-to 02:47:10'' will be end of trimmed video
+  * ''-c copy'' don't re-encode (very much faster)
+<file>
+ffmpeg -ss 00:00:10 -i yourvideo.mp4 -to 02:47:10 -c copy yourvideo_trimmed.mp4
+</file>

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