RTSP/SDP H264 'non-dated packet' when transcoding
Posted: 21 Dec 2006 23:57
I am trying to transcode an rtsp/sdp stream (H264 video, MPEG4) audio to MPEG-2. The original stream plays fine with VLC 0.8.6 but playback of the transcoded file produces audio but no video. The VLC output log just has "trying to send non-dated packet to stream output!" endlessly repeated.
I'm using:
I've seen several posts about H264 transcoding problems but nobody reporting this particular issue. This particular stream requires the "Use RTP over RTSP (TCP)" preference to be set. (Not sure if that's relevant.)
Here's the pertinant section of the output from VLC:[/code]
I'm using:
Code: Select all
rtsp://blah/blah/foobarH264500.sdp :sout=#transcode{vcodec=mp2v,vb=1024,scale=1,acodec=mpga,ab=192,channels=2,audio-sync}
:duplicate{dst=std{access=file,mux=ps,dst="C:\blah\foobar.mpg"}}Here's the pertinant section of the output from VLC:
Code: Select all
main debug: creating demux: access='rtsp' demux='' path='blah/blah/foobarH264500.sdp'
main debug: looking for access_demux module: 1 candidate
live555 debug: RTP subsession 'video/H264'
live555 debug: RTP subsession 'audio/MPEG4-GENERIC'
main debug: selecting program id=0
main debug: using access_demux module "live555"
main debug: looking for a subtitle file in C:\blah\
main debug: looking for packetizer module: 17 candidates
packetizer_h264 debug: found NAL_SPS
main debug: using packetizer module "packetizer_h264"
main debug: stream out mode -> no decoder thread
main debug: looking for packetizer module: 17 candidates
packetizer_mpeg4audio debug: running MPEG4 audio packetizer
packetizer_mpeg4audio debug: AAC 44100Hz 1024 samples/frame
main debug: using packetizer module "packetizer_mpeg4audio"
main debug: stream out mode -> no decoder thread
main debug: starting in async mode
main debug: `rtsp://blah/blah/foobarH264500.sdp' successfully opened
main debug: adding a new input
stream_out_transcode debug: creating audio transcoding from fcc=`mp4a' to fcc=`mpga'
main debug: looking for decoder module: 27 candidates
main debug: using decoder module "faad"
main debug: looking for encoder module: 10 candidates
ffmpeg debug: libavcodec initialized (interface 3348736 )
ffmpeg debug: found encoder MPEG Audio layer 1/2
main debug: using encoder module "ffmpeg"
main debug: looking for audio filter2 module: 5 candidates
audio_format debug: fl32->s16l, bits per sample: 32
main debug: using audio filter2 module "audio_format"
stream_out_duplicate debug: duplicated a new stream codec=mpga (es=1 group=0)
main debug: adding a new input
mux_ps debug: adding input codec=mpga
stream_out_duplicate debug: - added for output 0
faad warning: decoded zero sample
packetizer_h264 debug: found NAL_PPS
stream_out_transcode debug: drift is too high, resetting master sync
main debug: adding a new input
stream_out_transcode debug: creating video transcoding from fcc=`h264' to fcc=`mp2v'
main debug: looking for decoder module: 27 candidates
ffmpeg debug: libavcodec already initialized
ffmpeg debug: postprocessing disabled
ffmpeg debug: ffmpeg codec (h264) started
main debug: using decoder module "ffmpeg"
main debug: looking for encoder module: 10 candidates
ffmpeg debug: libavcodec already initialized
ffmpeg debug: found encoder MPEG-2 Video
main debug: using encoder module "ffmpeg"
main debug: removing module "ffmpeg"
main warning: trying to send non-dated packet to stream output!
main warning: trying to send non-dated packet to stream output!
main warning: trying to send non-dated packet to stream output!
main warning: trying to send non-dated packet to stream output!
main warning: trying to send non-dated packet to stream output!
main warning: trying to send non-dated packet to stream output!
main warning: trying to send non-dated packet to stream output!
main warning: trying to send non-dated packet to stream output!
main warning: trying to send non-dated packet to stream output!
main warning: trying to send non-dated packet to stream output!
