[gst-devel] ffmpeg flv mux issue

[Christian Schaller]

Hi Kumar,
Using ffmpeg muxer (and demuxers) in GStreamer is a bit of a hit and
miss. Have you tried using the native FLV muxer from gst-plugins-bad?

Christian

On Thu, 2008-12-04 at 18:36 +0530, Kumar wrote:
> Hi all,
> 
> I am facing some issues while muxing H264 stream into FLV format using
> ffmux_flv element . The muxing thro videotestsrc generates the proper FLV
> file.
> But when tried muxing the H264 file using filesrc, its not generating proper
> output. I have described it in the following steps:
> 
> 
> STEP-1: Mux H264 stream into FLV using 'videoteststream' , Play back is
> proper in Flash Player:
> 
> gst-launch-0.10 -vvv videotestsrc num-buffers=100 ! x264enc ! ffmux_flv !
> filesink location=/home/vsrc.flv
> 
> 
> MESSAGE:
> /GstPipeline:pipeline0/ffmux_flv:ffmux_flv0.GstPad:video_0: caps =
> video/x-h264, format=(fourcc)I420, width=(int)320, height=(int)240,


> framerate=(fraction)30/1,
> codec_data=(buffer)014d4033ffe10017674d403392540a0fd80880000003008000001e478
> c195001000468ee3c80
> 
> 
> 
> STEP-2: Dump H264 Stream:
> gst-launch-0.10 -vvv videotestsrc num-buffers=100 !  x264enc ! filesink
> location=/home/vsrc.264
> 
> MESSAGE:
> /GstPipeline:pipeline0/GstFileSink:filesink0.GstPad:sink: caps =
> video/x-h264, format=(fourcc)I420, width=(int)320, height=(int)240,
> framerate=(fraction)30/1,
> codec_data=(buffer)014d4033ffe10017674d403392540a0fd80880000003008000001e478
> c195001000468ee3c80
> 
> 
> STEP-3: Now try to mux the dumped H264 using filesrc: (No proper playback)
> 
> gst-launch-0.10 -vvv filesrc location=/home/vsrc.264 !  h264parse !
> capsfilter "caps=video/x-h264, format=(fourcc)I420, width=(int)320,
> height=(int)240, framerate=(fraction)30/1"  ! ffmux_flv ! filesink
> location=/home/vsrc_test_1.flv
> 
> Able to mux, but cannot play back on Flash player.
> 
> 
> STEP-4: mux with codec-data in caps filter( from STEP-1): (For proper
> playback)
> 
> gst-launch-0.10 -vvv filesrc location=/home/vsrc.264 !  h264parse !
> capsfilter "caps=video/x-h264, format=(fourcc)I420, width=(int)320,
> height=(int)240, framerate=(fraction)30/1,
> codec_data=(buffer)014d4033ffe10017674d403392540a0fd80880000003008000001e478
> c195001000468ee3c80"  ! ffmux_flv ! filesink location=/home/vsrc_test_2.flv
> 
> 
> If I use the same codec_data for the other 320x240 test streams through
> filesrc , I am not able to get the proper output.
> 
> Whats this codec_data cap? Is it necessary to use capsfilter with codec_data
> to get proper data output?
> 
> Is there any code change required in gst plug-in ?
> 
> 
> Thanks & Regards,
> Kumar KM
> 
> 
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