[vlc-devel] Can't decode MP4 RTP streams

[Osku Salerma]

VLC 0.8.1 fails trying to display a RTP-streamed MP4 file. The sending
side is also VLC 0.8.1 using the following command line:

vlc --reset-config file:///test.ts --sout "#transcode:rtp" --sout-transcode-vcodec="mp4v" --sout-transcode-vb="384" --sout-transcode-scale="0.25" --sout-rtp-dst="1.2.3.4" --sout-rtp-sdp="file:///test.sdp" --sout-rtp-port-audio="1234" --sout-rtp-port-video="1236" -I dummy

The streams seem ok, since at least Quicktime plays the stream ok. VLC
doesn't show any video or audio, just logs errors like this when I try to
open the test.sdp file:

ffmpeg error: cannot open encoder
stream_out_transcode error: cannot find encoder
access_output_udp debug: mmh, packets in the past (-103755) -> drop
access_output_udp debug: dropped 1 packets
access_output_udp debug: mmh, packets in the past (-16800) -> drop
access_output_udp debug: dropped 1 packets
access_output_udp debug: mmh, packets in the past (-827466) -> drop
access_output_udp debug: dropped 1 packets
access_output_udp debug: mmh, packets in the past (-286322) -> drop
access_output_udp debug: dropped 1 packets
access_output_udp debug: mmh, packets in the past (-4789) -> drop
access_output_udp debug: dropped 1 packets
access_output_udp debug: mmh, packets in the past (-301089) -> drop
access_output_udp debug: dropped 1 packets
access_output_udp debug: mmh, packets in the past (-159145) -> drop
access_output_udp debug: dropped 1 packets
access_output_udp debug: mmh, packets in the past (-654811) -> drop
access_output_udp debug: dropped 1 packets
...

This happens both on debian testing and on windows.

Am I doing something wrong, is this a bug of some kind, or does VLC simply
not support displaying raw MP4 RTP streams even though it can output them?

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