[gst-devel] problems when playing video files with

Joyious He joyious at 163.com
Tue Oct 23 10:28:00 CEST 2007 

 Hi,
 I tried the command and got the response below:
 
    Joyious He schrieb:
    >  Hi all,
    >
    > Now I'm going to test the video display on my target arm borad.it use
    > the directfb as the display layer.and I got problems below:
    >
    >
    > 1:The videotestsrc work well for that dfb-example,but when i just get
    > the command line "gst-launch -v videotestsrc ! dfbvideosink", it threw
    > out some err msg: "format can not negotiate".
    gst-launch -v videotestsrc ! ffmpegcolorspace ! dfbvideosink
 *************************************************************************************************
gst-launch -v videotestsrc ! ffmpegcolorspace ! dfbvideosink
ERROR: from element /pipeline0/videotestsrc0: Could not negotiate format
Additional debug info:
gstbasesrc.c(1865): gst_base_src_start (): /pipeline0/videotestsrc0:
Check your filtered caps, if any
this work well on my PC, but not on the board, I tried to use GST_DEBUG to get more msg, but at most condition it will got err:
Caught SIGSEGV accessing address (nil)
Spinning.  Please run 'gdb gst-launch 1532' to continue debugging, Ctrl-C to quit, or Ctrl-\ to dump core.
*************************************************************************************************
    >
    > 2:Then I put the videotestsrc away, try to play some AVI files.but when
    > I try the application or the command line like : " gst-launch -v filesrc
    > location=/convertavi ! avidemux name=demux demux.video_00 ! queue !
    > decodebin ! ffmpegcolorspace ! videoscale ! dfbvideosink". Iwas told the
    > pipeline was pause. I check the debug message.I got the reason:
    filesrc location=/convertavi ! decodebin name=demux demux.video_00 ! queue !
    decodebin ! ffmpegcolorspace ! videoscale ! dfbvideosink
***************************************************************************************************
gst-launch -v filesrc location=/convert.avi ! decodebin name=demux demux.video_00 ! queue ! decodebin ! ffmpegcolorspace ! videoscale ! dfbvideosink
ERROR: from element /pipeline0/demux/avidemux0: Internal data stream error.
Additional debug info:
gstavidemux.c(3577): gst_avi_demux_loop (): /pipeline0/demux/avidemux0:
streaming stopped, reason not-linked
I got the debug message and the reason for this not-linked is when using decodebin, it will try to get link to the demux.audio_00, I did not get audio sink this pipeline, so it gave the not-link err.
************************************************************************************************************
then i replace this decodebin with mpeg2dec,thus :
gst-launch -v filesrc location=/convert.avi ! avidemux name=demux demux.video_00 ! mpeg2dec ! ffmpegcolorspace ! videoscale ! dfbvideosink
ERROR: from element /pipeline0/demux: Internal data stream error.
Additional debug info:
gstavidemux.c(3577): gst_avi_demux_loop (): /pipeline0/demux:
streaming stopped, reason not-negotiated
0:00:12.098377000   968 0xa3920 WARN              avidemux gstavidemux.c:1616:gst_avi_demux_stream_index:<demux> skip LIST chunk
/pipeline0/mpeg2dec0.sink: caps = video/mpeg, systemstream=(boolean)false, mpegversion=(int)2, framerate=(fraction)25/1, width=(int)128, height=(int)112
/pipeline0/mpeg2dec0.src: caps = video/x-raw-yuv, format=(fourcc)I420, width=(int)128, height=(int)112, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)25/1
0:00:13.109244000   968 0xa3920 WARN              avidemux gstavidemux.c:3548:gst_avi_demux_loop: stream_movi flow: not-negotiated / not-negotiated
0:00:13.110534000   968 0xa3920 WARN              avidemux gstavidemux.c:3577:gst_avi_demux_loop:<demux> error: Internal data stream error.
0:00:13.111456000   968 0xa3920 WARN              avidemux gstavidemux.c:3577:gst_avi_demux_loop:<demux> error: streaming stopped, reason not-negotiated
ERROR: from element /pipeline0/demux: Internal data stream error.
Additional debug info:
gstavidemux.c(3577): gst_avi_demux_loop (): /pipeline0/demux:
streaming stopped, reason not-negotiated
**********************************************************************************************************************
    >
    > "0:00:01.613967000 [332m 1633[00m 0x1af80 [32;01mINFO [00m [00;01;34m
    > GST_EVENT gstpad.c:4242:gst_pad_send_event:<mpeg2dec0:sink>[00m Received
    > event on flushing pad. Discarding
    > 0:00:01.614717000 [332m 1633[00m 0x1af80 [32;01mINFO [00m [00;01;34m
    > GST_EVENT gstpad.c:4242:gst_pad_send_event:<mpeg2dec0:sink>[00m Received
    > event on flushing pad. Discarding
    > 0:00:01.616135000 [332m 1633[00m 0x1af80 [32;01mINFO [00m [00;01;34m
    > GST_EVENT gstpad.c:4242:gst_pad_send_event:<mpeg2dec0:sink>[00m Received
    > event on flushing pad. Discarding
    > 0:00:01.617260000 [332m 1633[00m 0x1af80 [33;01mWARN [00m [00m avidemux
    > gstavidemux.c:3548:gst_avi_demux_loop:[00m stream_movi flow: wrong-state
    > / ok"
    >
    > 3:I also tried another way. I convert a AVI file into a raw data as a
    > temp file, and use filesrc and dfbvideo sink to play :"gst-launch -v
    > filesrc location=/convert2 blocksize=65536 ! dfbvideosink". Some thing
    > is coming out, but its not the correct video.I think it's probably the
    > frame format mismatching. the temp file is using YV12(I convert it using
    > mplayer and its default value is YUV YV12) and my directfb is using
    > RGB32. So how can i specify the caps convert, changing the format of
    > mplayer default or specify it in the gstreamer commad line? I tried the
    > ffmpegcolorspace like "gst-launch -v filesrc location=/convert2
    > blocksize=65536 ! ffmpegcolorspace ! dfbvideosink" and I was told the
    > format can not negotiated.
***********************************************************************************************************************
Here i got the frame displayed on the board,just using the capsfilter to specify the caps format:
GST_DEBUG="dfbvideosink:3" gst-launch -v filesrc location="/t3" blocksize=57344 ! video/x-raw-rgb,bpp=32,depth=32,width=128,height=112,framerate=25/1,endianness=4321,pixel-aspect-ratio=1/1,red_mask=65280, green_mask=16711680, blue_mask=-16777216, alpha_mask=255 ! dfbvideosink
**********************************************************************************************************************
    >
    > Could you all give me any ideas about all the problems above ?
    >
    Do I get a free device when it gets released :)
If i can get some in hand, of cause I'll get one diliver to you. But it seems not possible for me to get any then :(
    Stefan
    >
    > Thanks very much.
    >
    > Best Regard
    > Joyious
    >  
    >  
    >  
    >
    >
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