[FFmpeg-user] Help Please

[James Linder]

I discovered that this is all due to faulty hardware!
James

On 15/07/2013, at 8:44 PM, James Linder wrote:

> If any kind soul can show me the error of my ways I'd appreciate it lots:
> 
> I want to record audio and video to a file
> I want to display the video as it is being recorded.
> 
> This has worked with different v4l hardware :-(
> 
> I record:
> /usr/bin/ffmpeg -f pulse -itsoffset 0.2 -i default -f v4l2 -i /dev/video0 -vtag divx -s 720x576 -r pal -q:v 5 mon.avi -s 720x576 -f rawvideo - |/usr/bin/ffplay -f rawvideo -i - -s 720x576
> 
> The rawvideo size has no effect.
> 
> I get:
> ffplay version N-54580-g694550f Copyright (c) 2003-2013 the FFmpeg developers
>  built on Jul 10 2013 11:43:58 with gcc 4.7 (SUSE Linux)
>  configuration: --enable-libv4l2 --enable-libpulse
>  libavutil      52. 38.100 / 52. 38.100
>  libavcodec     55. 18.102 / 55. 18.102
>  libavformat    55. 11.101 / 55. 11.101
>  libavdevice    55.  2.100 / 55.  2.100
>  libavfilter     3. 79.100 /  3. 79.100
>  libswscale      2.  3.100 /  2.  3.100
>  libswresample   0. 17.102 /  0. 17.102
> Option -s is deprecated, use -video_size.
> ffmpeg version N-54580-g694550f Copyright (c) 2000-2013 the FFmpeg developers
>  built on Jul 10 2013 11:43:58 with gcc 4.7 (SUSE Linux)
>  configuration: --enable-libv4l2 --enable-libpulse
>  libavutil      52. 38.100 / 52. 38.100
>  libavcodec     55. 18.102 / 55. 18.102
>  libavformat    55. 11.101 / 55. 11.101
>  libavdevice    55.  2.100 / 55.  2.100
>  libavfilter     3. 79.100 /  3. 79.100
>  libswscale      2.  3.100 /  2.  3.100
>  libswresample   0. 17.102 /  0. 17.102
> Guessed Channel Layout for  Input Stream #0.0 : stereo
> Input #0, pulse, from 'default':
>  Duration: N/A, start: 0.010790, bitrate: 1536 kb/s
>    Stream #0:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
> Input #1, video4linux2,v4l2, from '/dev/video0':B sq=    0B f=0/0   
>  Duration: N/A, start: 1373874168.744534, bitrate: 165888 kb/s
>    Stream #1:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 165888 kb/s, 25 fps, 25 tbr, 1000k tbn, 1000k tbc
> File 'mon.avi' already exists. Overwrite ? [y/N]     nan    :  0.000 fd=   0 aq=    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0    
> Output #0, avi, to 'mon.avi':
>  Metadata:
>    ISFT            : Lavf55.11.101
>    Stream #0:0: Video: mpeg4 (divx / 0x78766964), yuv420p, 720x576, q=2-31, 200 kb/s, 25 tbn, 25 tbc
>    Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, stereo, fltp, 192 kb/s
> Output #1, rawvideo, to 'pipe:':
>  Metadata:
>    encoder         : Lavf55.11.101
>    Stream #1:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 800x600, q=2-31, 200 kb/s, 90k tbn, 25 tbc
> Stream mapping:
>  Stream #1:0 -> #0:0 (rawvideo -> mpeg4)
>  Stream #0:0 -> #0:1 (pcm_s16le -> ac3)
>  Stream #1:0 -> #1:0 (rawvideo -> rawvideo)
> Press [q] to stop, [?] for help
> Input #0, rawvideo, from 'pipe:':
>  Duration: N/A, start: 0.000000, bitrate: 144000 kb/s
>    Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 800x600, 144000 kb/s, 25 tbr, 25 tbn, 25 tbc
> frame=   16 fps=0.0 q=5.0 q=0.0 size=     155kB time=00:00:00.64 bitrate=1981.5k  10.36 M-V: -0.002 fd=   0 aq=    0KB vq= 4219KB sq=    0B f=0/0
> 
> My live picture is garbled/all one colour/lines
> The recorded file is perfect
> 
> I get even more confused, I try to use tee
> 
> /usr/bin/ffmpeg -f pulse -itsoffset 0.2 -i default -f v4l2 -i /dev/video0 -vtag divx -s 720x576 -r pal -q:v 5 -f tee -map a:0 -map v:0 -c copy mon.avi |mplayer -
> 
> and get:
> ffmpeg version N-54580-g694550f Copyright (c) 2000-2013 the FFmpeg developers
>  built on Jul 10 2013 11:43:58 with gcc 4.7 (SUSE Linux)
>  configuration: --enable-libv4l2 --enable-libpulse
>  libavutil      52. 38.100 / 52. 38.100
>  libavcodec     55. 18.102 / 55. 18.102
>  libavformat    55. 11.101 / 55. 11.101
>  libavdevice    55.  2.100 / 55.  2.100
>  libavfilter     3. 79.100 /  3. 79.100
>  libswscale      2.  3.100 /  2.  3.100
>  libswresample   0. 17.102 /  0. 17.102
> MPlayer dev-SVN-r35127-4.7-openSUSE Linux 12.3 (x86_64)-Packman (C) 2000-2012 MPlayer Team
> Can't open joystick device /dev/input/js0: No such file or directory
> Can't init input joystick
> mplayer: could not connect to socket
> mplayer: No such file or directory
> Failed to open LIRC support. You will not be able to use your remote control.
> 
> Playing -.
> Reading from stdin...
> Guessed Channel Layout for  Input Stream #0.0 : stereo
> Input #0, pulse, from 'default':
>  Duration: N/A, start: 0.009793, bitrate: 1536 kb/s
>    Stream #0:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
> Input #1, video4linux2,v4l2, from '/dev/video0':
>  Duration: N/A, start: 1373877364.072402, bitrate: 165888 kb/s
>    Stream #1:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 720x576, 165888 kb/s, 25 fps, 25 tbr, 1000k tbn, 1000k tbc
> Stream map 'v:0' matches no streams.
> libavformat version 54.25.104 (internal)
> 
> I don't understand why tee does not do what I expect
> I don't understand why rawvideo from one v4l device works fine, another does not
> 
> Thanks
> James
> 
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