Hello to all. Some days ago, after I got lastest ffmpeg source, ffmpeg stoped to work with my v4l2 cameras. They're using the bttv module (ubuntu 10.10 ia32).
The ffplay's output: $ ./ffplay -f video4linux2 /dev/video0 ffplay version git-N-30818-g369c68c, Copyright (c) 2003-2011 the FFmpeg developers built on Jun 17 2011 12:16:37 with gcc 4.4.5 configuration: --disable-gpl --enable-static --enable-libvpx --disable-libschroedinger --disable-libtheora --prefix=/home/devstar22/projects/build_optm --enable-pthreads --extra-cflags='-I/home/devstar22/projects/build_optm/include -O3 -msse3 -mfpmath=sse -march=core2' --enable-extra-warnings --extra-ldflags=-L/home/devstar22/projects/build_optm/lib libavutil 51. 8. 0 / 51. 8. 0 libavcodec 53. 7. 0 / 53. 7. 0 libavformat 53. 3. 1 / 53. 3. 1 libavdevice 53. 1. 1 / 53. 1. 1 libavfilter 2. 18. 0 / 2. 18. 0 libswscale 0. 14. 1 / 0. 14. 1 [video4linux2 @ 0x95d57a0] ioctl set time per frame(1/25) failed [video4linux2 @ 0x95d57a0] Could not find codec parameters (Invalid Codec type -1) [video4linux2 @ 0x95d57a0] Estimating duration from bitrate, this may be inaccurate /dev/video0: could not find codec parameters Why does it happen? Have you broken the v4l2 support? I'm sure ffmpeg was compiled with v4l2 support, so I really don't know why it happens. That behavior also happens in my application, using libavformat api. When I open the device passing a AVInputFormat correct confiured to input "video4linux2", the call av_open_input_file has success (returns 0), but prints on screen: [video4linux2 @ 0x95d57a0] ioctl set time per frame(1/25) failed And when I call av_find_stream_info(), it returns the -1 code and print on screen: [video4linux2 @ 0x95d57a0] Could not find codec parameters (Invalid Codec type -1) [video4linux2 @ 0x95d57a0] Estimating duration from bitrate, this may be inaccurate Obs: when I use the ffplay and libav* libraries installed globally in the system (via ubuntu repositories), ffplay opens the cameras normally. Best wishes. _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
