Thomas Seilund writes:
Hi All,
I record from a Logitech HD Pro C920 webcam.
Case 1 below
If I record video only then the play back is ok
Case 2 below
If I record video and audio then the play back runs way to fast.
Case 3 below
If I record audio only then the play back is ok.
I compiled with pulse audio support and now I use the command line and it
works!
tps@t420:~/temp$ ffmpeg -y -f v4l2 -r 24 -s 640x360 -i /dev/video1 -f pulse
-i 2 -r 24 -c:v libx264 -pix_fmt yuv420p -preset ultrafast -c:a aac -b:a
128k -ar 44100 -strict -2 -f mpegts test2.ts
ffmpeg version N-69238-g2699a37 Copyright (c) 2000-2015 the FFmpeg
developers
built on Feb 24 2015 18:13:15 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
configuration: --enable-gpl --enable-libmp3lame --enable-libvpx --enable-
libx264 --enable-version3 --enable-libvorbis --enable-libfreetype --enable-
libv4l2 --enable-libfdk-aac --enable-nonfree --enable-libpulse
libavutil 54. 17.100 / 54. 17.100
libavcodec 56. 20.100 / 56. 20.100
libavformat 56. 19.100 / 56. 19.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 8.101 / 5. 8.101
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, video4linux2,v4l2, from '/dev/video1':
Duration: N/A, start: 5275.972254, bitrate: 88473 kb/s
Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 640x360,
88473 kb/s, 24 fps, 24 tbr, 1000k tbn, 1000k tbc
Guessed Channel Layout for Input Stream #1.0 : stereo
Input #1, pulse, from '2':
Duration: N/A, start: 1424798318.602732, bitrate: 1536 kb/s
Stream #1:0: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s
[libx264 @ 0x3535700] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 0x3535700] profile Constrained Baseline, level 3.0
Output #0, mpegts, to 'test2.ts':
Metadata:
encoder : Lavf56.19.100
Stream #0:0: Video: h264 (libx264), yuv420p, 640x360, q=-1--1, 24 fps,
90k tbn, 24 tbc
Metadata:
encoder : Lavc56.20.100 libx264
Stream #0:1: Audio: aac, 44100 Hz, stereo, fltp, 128 kb/s
Metadata:
encoder : Lavc56.20.100 aac
Stream mapping:
Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
Stream #1:0 -> #0:1 (pcm_s16le (native) -> aac (native))
Press [q] to stop, [?] for help
frame= 163 fps= 25 q=-1.0 Lsize= 834kB time=00:00:06.79
bitrate=1005.4kbits/s
video:646kB audio:102kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 11.427479%
[libx264 @ 0x3535700] frame I:1 Avg QP:20.00 size: 23826
[libx264 @ 0x3535700] frame P:162 Avg QP:21.30 size: 3936
[libx264 @ 0x3535700] mb I I16..4: 100.0% 0.0% 0.0%
[libx264 @ 0x3535700] mb P I16..4: 1.8% 0.0% 0.0% P16..4: 43.6% 0.0%
0.0% 0.0% 0.0% skip:54.6%
[libx264 @ 0x3535700] coded y,uvDC,uvAC intra: 25.2% 49.6% 23.2% inter:
19.2% 19.8% 1.8%
[libx264 @ 0x3535700] i16 v,h,dc,p: 42% 18% 23% 17%
[libx264 @ 0x3535700] i8c dc,h,v,p: 55% 22% 19% 5%
[libx264 @ 0x3535700] kb/s:779.16
tps@t420:~/temp$
Thanks
Thomas S
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