Hello, I have a MJPEG video file that I want to encode into H.264 and stream it over rtp. If I save the encoded video into a file, all looks fine. The video has the right format and can be played. But if I want to stream the video, either the NAL prefix codes (0x00 0x00 0x00 0x01) of the frames are missing or the rtp header is missing. What am I doing wrong?
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1st try - recording the encoded video:
avconv -y -f image2pipe -c:v mjpeg -i video.mjpeg -vcodec
libx264 -bf 0 -bsf:v h264_mp4toannexb -f h264 encoded.264
-> mediainfo encoded.264
General
Complete name : encoded.264
Video
Format : AVC
Format profile : [email protected]
[.]
Writing library : x264 core 120 r2151 a3f4407
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2nd try - streaming the encoded video and force rtp output format -
Problem: No NAL prefix codes (00 00 00 01)
avconv -y -f image2pipe -c:v mjpeg -i video.mjpeg -vcodec
libx264 -bf 0 -bsf:v h264_mp4toannexb -f rtp rtp://10.100.1.10:22345
-> avconv version 10, Copyright (c) 2000-2014 the Libav
developers[...]
Input #0, image2pipe, from 'video.mjpeg':
Duration: N/A, bitrate: N/A
Stream #0.0: Video: mjpeg, yuvj420p, 704x576 [PAR 96:96
DAR 11:9], 25 fps, 25 tbn
[libx264 @ 0x3097f80] using SAR=1/1
[libx264 @ 0x3097f80] using cpu capabilities: MMX2 SSE2Fast
SSSE3 FastShuffle Cache64
[libx264 @ 0x3097f80] profile High, level 3.0
Output #0, rtp, to 'rtp://10.100.1.10:22345':
Metadata:
encoder : Lavf55.12.0
Stream #0.0: Video: libx264, yuvj420p, 704x576 [PAR 96:96
DAR 11:9], q=-1--1, 90k tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (mjpeg -> libx264)
SDP:
v=0
o=- 0 0 IN IP4 127.0.0.1
s=No Name
c=IN IP4 10.100.1.10
t=0 0
a=tool:libavformat 55.12.0
m=video 22345 RTP/AVP 96
a=rtpmap:96 H264/90000
a=fmtp:96 packetization-mode=1
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3rd try - streaming the encoded video and force h264 output format -
Problem: Rtp header missing. Input #0, image2pipe, from 'test1.mjpeg':
avconv -y -f image2pipe -c:v mjpeg -i video.mjpeg -vcodec
libx264 -bf 0 -bsf:v h264_mp4toannexb -f h264 rtp://10.100.1.10:22345
-> Input #0, image2pipe, from 'video.mjpeg':
Duration: N/A, bitrate: N/A
Stream #0.0: Video: mjpeg, yuvj420p, 704x576 [PAR 96:96 DAR
11:9], 25 fps, 25 tbn
[libx264 @ 0x1fa3f80] using SAR=1/1
[libx264 @ 0x1fa3f80] using cpu capabilities: MMX2 SSE2Fast
SSSE3 FastShuffle Cache64
[libx264 @ 0x1fa3f80] profile High, level 3.0
Output #0, h264, to 'rtp://10.100.1.10:22345':
Metadata:
encoder : Lavf55.12.0
Stream #0.0: Video: libx264, yuvj420p, 704x576 [PAR 96:96
DAR 11:9], q=-1--1, 90k tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (mjpeg -> libx264)
Thank you,
Janina
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