[gst-devel] BUG: both h264 encoders fail

Csaba Varró varrocs at gmail.com
Thu Nov 6 15:37:50 CET 2008


Hello!

I want to send an encoded h264 stream over RTP. There are two h264 encoders
in gstreamer I found: ffenc_libx264 and x264enc. Both fails.

The stream encoded by x264enc is rejected by the rtph264pay:

 gst-launch v4lsrc device=/dev/video0 ! x264enc ! rtph264pay ! fakesink
 Setting pipeline to PAUSED ...
 Pipeline is live and does not need PREROLL ...
 Setting pipeline to PLAYING ...
 New clock: GstSystemClock
 x264 [warning]: width or height not divisible by 16 (160x120), compression
will suffer.
 x264 [info]: using SAR=1/1
 x264 [info]: using cpu capabilities: MMX2 SSE2 SSE3 Cache64
 ERROR: from element /pipeline0/rtph264pay0: The stream is in the wrong
format.
 Additional debug info:
 gstrtph264pay.c(673): gst_rtp_h264_pay_handle_buffer ():
/pipeline0/rtph264pay0:
 AVC H264 is not supported yet
 Execution ended after 182851632 ns.
 Setting pipeline to PAUSED ...
 Setting pipeline to READY ...
 Setting pipeline to NULL ...
 x264 [info]: slice I:1     Avg QP:15.62  size:  7192
 x264 [info]: mb I  I16..4:  0.0%  0.0% 100.0%
 x264 [info]: SSIM Mean Y:0.9969846
 x264 [info]: kb/s:1438.4
 FREEING pipeline ...

The ffenc_libx264 can't encode from my v4l2src source:

 gst-launch v4l2src device=/dev/video1 ! ffenc_libx264 ! fakesink

 Setting pipeline to PAUSED ...
 Pipeline is live and does not need PREROLL ...
 Setting pipeline to PLAYING ...
 New clock: GstSystemClock
 Caught SIGSEGV accessing address (nil)
  Killed

Are these problems bugs in the encoders or I am doing something wrong?

Thanks,
Csaba Varró
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