Changes between Initial Version and Version 1 of Ticket #1570, comment 9


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Timestamp:
Aug 8, 2012, 8:58:22 PM (7 years ago)
Author:
llarevo
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  • Ticket #1570, comment 9

    initial v1  
    66>
    77> to see if it doesn't show anything? (for old version you might need to change v4l2 into video4linux2)
     8
     9 
    810
    911ffplay doesn't show anything and has to be killed by strg+c:
     
    2325^C
    2426}}}
     27
     28
     29
     30But the suggested command doesn't work either. I tried it with ffmpeg 0.5.10, which is known to be working. Without success:
     31{{{
     32[llarevo@llarevo-desktop bin]$ ./ffplay -f v4l2 -i /dev/video0
     33FFplay version 0.5.10, Copyright (c) 2003-2012 Fabrice Bellard, et al.
     34  configuration: --prefix=/opt/ffmpeg-0.5.10 --enable-nonfree --enable-gpl --enable-libfaac --enable-libgsm --enable-libmp3lame --enable-libtheora --enable-libxvid
     35  libavutil     49.15. 0 / 49.15. 0
     36  libavcodec    52.20. 1 / 52.20. 1
     37  libavformat   52.31. 0 / 52.31. 0
     38  libavdevice   52. 1. 0 / 52. 1. 0
     39  built on Aug  8 2012 19:52:08, gcc: 4.7.0 20120507 (Red Hat 4.7.0-5)
     40Unknown input format: v4l2
     41[llarevo@llarevo-desktop bin]$ ./ffplay -f video4linux2 -i /dev/video0
     42FFplay version 0.5.10, Copyright (c) 2003-2012 Fabrice Bellard, et al.
     43  configuration: --prefix=/opt/ffmpeg-0.5.10 --enable-nonfree --enable-gpl --enable-libfaac --enable-libgsm --enable-libmp3lame --enable-libtheora --enable-libxvid
     44  libavutil     49.15. 0 / 49.15. 0
     45  libavcodec    52.20. 1 / 52.20. 1
     46  libavformat   52.31. 0 / 52.31. 0
     47  libavdevice   52. 1. 0 / 52. 1. 0
     48  built on Aug  8 2012 19:52:08, gcc: 4.7.0 20120507 (Red Hat 4.7.0-5)
     49./ffplay: unrecognized option '-i'
     50[llarevo@llarevo-desktop bin]$ ./ffplay -f video4linux2
     51FFplay version 0.5.10, Copyright (c) 2003-2012 Fabrice Bellard, et al.
     52  configuration: --prefix=/opt/ffmpeg-0.5.10 --enable-nonfree --enable-gpl --enable-libfaac --enable-libgsm --enable-libmp3lame --enable-libtheora --enable-libxvid
     53  libavutil     49.15. 0 / 49.15. 0
     54  libavcodec    52.20. 1 / 52.20. 1
     55  libavformat   52.31. 0 / 52.31. 0
     56  libavdevice   52. 1. 0 / 52. 1. 0
     57  built on Aug  8 2012 19:52:08, gcc: 4.7.0 20120507 (Red Hat 4.7.0-5)
     58An input file must be specified
     59[llarevo@llarevo-desktop bin]$ man ffplay
     60[llarevo@llarevo-desktop bin]$ ./ffplay -f video4linux2 /dev/video0
     61FFplay version 0.5.10, Copyright (c) 2003-2012 Fabrice Bellard, et al.
     62  configuration: --prefix=/opt/ffmpeg-0.5.10 --enable-nonfree --enable-gpl --enable-libfaac --enable-libgsm --enable-libmp3lame --enable-libtheora --enable-libxvid
     63  libavutil     49.15. 0 / 49.15. 0
     64  libavcodec    52.20. 1 / 52.20. 1
     65  libavformat   52.31. 0 / 52.31. 0
     66  libavdevice   52. 1. 0 / 52. 1. 0
     67  built on Aug  8 2012 19:52:08, gcc: 4.7.0 20120507 (Red Hat 4.7.0-5)
     68[video4linux2 @ 0x7f6d1c005230]Wrong size (0x0)
     69/dev/video0: Error while opening file
     70}}}
     71With ffmpeg 0.5.10, I don't have any problems with capturing:
     72{{{
     73 ./ffmpeg -debug 1 -t 300 -f video4linux2 -s vga -r 25 -b 2000k -i /dev/video0 /home/tbastian/out-vga-2M-5min.mpg
     74FFmpeg version 0.5.10, Copyright (c) 2000-2012 Fabrice Bellard, et al.
     75  configuration: --prefix=/opt/ffmpeg-0.5.10 --enable-nonfree --enable-gpl --enable-libfaac --enable-libgsm --enable-libmp3lame --enable-libtheora --enable-libxvid
     76  libavutil     49.15. 0 / 49.15. 0
     77  libavcodec    52.20. 1 / 52.20. 1
     78  libavformat   52.31. 0 / 52.31. 0
     79  libavdevice   52. 1. 0 / 52. 1. 0
     80  built on Aug  8 2012 19:52:08, gcc: 4.7.0 20120507 (Red Hat 4.7.0-5)
     81[video4linux2 @ 0x2e3a600][3]Capabilities: 5010015
     82[video4linux2 @ 0x2e3a600]The V4L2 driver set input_id: 0, input: Television
     83Input #0, video4linux2, from '/dev/video0':
     84  Duration: N/A, start: 1344448553.258682, bitrate: 92160 kb/s
     85    Stream #0.0, 1/1000000: Video: rawvideo, yuv420p, 640x480, 1/25, 92160 kb/s, 25 tbr, 1000k tbn, 25 tbc
     86Output #0, mpeg, to '/home/tbastian/out-vga-2M-5min.mpg':
     87    Stream #0.0, 1/90000: Video: mpeg1video, yuv420p, 640x480, 1/25, q=2-31, 2000 kb/s, 90k tbn, 25 tbc
     88Stream mapping:
     89  Stream #0.0 -> #0.0
     90Press [q] to stop encoding
     91frame=  327 fps= 25 q=5.4 Lsize=    3370kB time=13.04 bitrate=2117.1kbits/s   
     92video:3352kB audio:0kB global headers:0kB muxing overhead 0.541767%
     93}}}