[streaming] transcode and size problem

Vanhaute Nicolas nicolas.vanhaute at ac-clermont.fr
Wed Apr 16 11:07:44 CEST 2008 

hello,

to resume my problem in details :

- First computer (win with vlc 0.8.6f) with capture card which streams  
(stream in 720x576) in h264 to an other computer in udp

- second computer (linux with vlc 0.8.6f) that catches udp stream then  
transcodes it again in h264  then streams it for http access
(vlc -vvv udp:  --udp-caching 5000 --sout
'#transcode{vcodec=h264,vb=512,scale=1,acodec=mp4a,ab=16,channels=1}:duplicate{dst=std{access=http,mux=ts,dst=192.168.0.1:8080}}')

- third computer = one client (win with vlc 0.8.6f), that opens stream  
in http from second computer


=> results :

- on third computer I get stream with width = 1280 (see my last "logs"  
in my last mail)
- now if on the first computer I also stream for http access, then  
from third computer I connect to it, I get the right size (720x576)

=> problem is on the second computer ?

I provide you below "logs" from second computer, he seems to me that  
problem is ratio (in end of logs : "2.133333:1") that is not correct  
but why ? no idea

-----------------------------------------------------
[00000001] main private debug: checking builtin modules
[00000001] main private debug: checking plugin modules
[00000001] main private debug: loading plugins cache file  
/home/clermont/.vlc/cache/plugins-04041e.dat
[00000001] main private debug: recursively browsing `modules'
[00000001] main private debug: recursively browsing `/usr/lib/vlc'
[00000001] main private debug: recursively browsing `plugins'
[00000001] main private debug: module bank initialized, found 204 modules
[00000001] main private debug: opening config file /home/clermont/.vlc/vlcrc
[00000001] main private debug: CPU has capabilities 486 586 MMX MMXEXT  
SSE SSE2 FPU
[00000001] main private debug: looking for memcpy module: 1 candidate
[00000001] main private debug: using memcpy module "memcpy"
[00000267] main playlist debug: waiting for thread completion
[00000267] main playlist debug: thread 3079764880 (playlist) created  
at priority 0 (playlist/playlist.c:184)
[00000268] main private debug: waiting for thread completion
[00000268] main private debug: thread 3071372176 (preparser) created  
at priority 0 (playlist/playlist.c:210)
[00000269] main interface debug: looking for interface module: 1 candidate
[00000269] main interface debug: using interface module "hotkeys"
[00000269] main interface debug: thread 3062979472 (interface) created  
at priority 0 (interface/interface.c:231)
[00000271] main interface debug: looking for interface module: 1 candidate
[00000271] main interface debug: using interface module "screensaver"
[00000271] main interface debug: thread 3054586768 (interface) created  
at priority 0 (interface/interface.c:231)
[00000267] main playlist debug: adding playlist item `udp:' ( udp: )
[00000273] main interface debug: looking for interface module: 2 candidates
Interface de commande à distance initialisée, « h » pour obtenir  
de l’aide.
[00000273] main interface debug: using interface module "rc"
[00000273] main interface debug: thread 3046140816 (manager) created  
at priority 0 (interface/interface.c:216)
[00000267] main playlist debug: creating new input thread
[00000275] main input debug: waiting for thread completion
[00000275] main input debug: creating statistics handler
[00000277] main stream output debug: stream=`transcode'
[00000278] main private debug: looking for sout stream module: 1 candidate
[00000275] main input debug: thread 3037748112 (input) created at  
priority 0 (input/input.c:265)
[00000277] main stream output debug: stream=`duplicate'
[00000281] main private debug: looking for sout stream module: 1 candidate
[00000281] stream_out_duplicate private debug: creating 'duplicate'
[00000281] stream_out_duplicate private debug:  * adding  
`std{access=http,mux=ts,dst=192.168.0.1:8080}'
[00000277] main stream output debug: stream=`std'
[00000283] main private debug: looking for sout stream module: 1 candidate
[00000283] main private debug: set sout option: sout-standard-access to http
[00000283] main private debug: set sout option: sout-standard-mux to ts
[00000283] main private debug: set sout option: sout-standard-dst to  
192.168.0.1:8080
[00000283] stream_out_standard private debug: creating  
`http/ts://192.168.0.1:8080'
[00000283] stream_out_standard private debug: extension is 46:8080
[00000283] stream_out_standard private debug: extension -> mux=(null)
[00000283] stream_out_standard private debug: using  
`http/ts://192.168.0.1:8080'
[00000285] main private debug: looking for sout access module: 1 candidate
[00000285] main private: creating httpd
[00000285] main private debug: net: listening to 192.168.0.1 port 8080
[00000288] main http server debug: thread 3029121936 (httpd host  
thread) created at priority 0 (network/httpd.c:1078)
[00000285] main private debug: using sout access module "access_output_http"
[00000283] stream_out_standard private debug: access opened
[00000289] main private debug: looking for sout mux module: 1 candidate
[00000289] mux_ts private debug: shaping=200000 pcr=70000 dts_delay=400000
[00000289] main private debug: using sout mux module "mux_ts"
[00000277] main stream output debug: muxer support adding stream at any time
[00000283] stream_out_standard private debug: mux opened
[00000283] main private debug: using sout stream module "stream_out_standard"
[00000281] main private debug: using sout stream module "stream_out_duplicate"
[00000278] main private debug: set sout option: sout-transcode-vcodec to h264
[00000278] main private debug: set sout option: sout-transcode-vb to 512
[00000278] main private debug: set sout option: sout-transcode-scale to 1
[00000278] main private debug: set sout option: sout-transcode-acodec to mp4a
[00000278] main private debug: set sout option: sout-transcode-ab to 16
[00000278] main private debug: set sout option: sout-transcode-channels to 1
[00000278] stream_out_transcode private debug: codec audio=mp4a 0Hz 1  
channels 16Kb/s
[00000278] stream_out_transcode private debug: codec video=h264 0x0  
scaling: 1.000000 512kb/s
[00000278] main private debug: using sout stream module "stream_out_transcode"
[00000275] main input debug: `udp:' gives access `udp' demux `' path `'
[00000275] main input debug: creating demux: access='udp' demux='' path=''
[00000290] main demuxer debug: looking for access_demux module: 0 candidates
[00000290] main demuxer warning: no access_demux module matched "udp"
[00000275] main input debug: creating access 'udp' path=''
[00000291] main access debug: looking for access2 module: 6 candidates
[00000291] access_udp access debug: opening server=:0 local=:1234
[00000291] main access debug: net: connecting to '[]:0@[]:1234'
[00000291] main access debug: looking for network module: 1 candidate
[00000291] main access debug: using network module "ipv6"
[00000291] main access debug: removing module "ipv6"
[00000291] main access debug: using access2 module "access_udp"
[00000294] main private debug: pre buffering
[00000291] access_udp access debug: detected TS over raw UDP
[00000275] main input debug: creating demux: access='udp' demux='' path=''
[00000295] main demuxer debug: looking for demux2 module: 44 candidates
status change: ( new input: udp: )
status change: ( audio volume: 256 )
status change: ( play state: 1 )
[00000295] main demuxer debug: using demux2 module "ts"
[00000275] main input debug: looking for a subtitle file in /home/clermont/
[00000295] ts demuxer debug: DEMUX_SET_GROUP 0 (nil)
[00000275] main input debug: starting in sync mode
[00000291] access_udp access warning: unimplemented query in control
[00000275] main input debug: `udp:' successfully opened
[00000295] ts demuxer debug: pid[69] unknown
[00000295] ts demuxer debug: pid[68] unknown
libdvbpsi error (PSI decoder): TS discontinuity (received 2, expected  
0) for PID 0
[00000295] ts demuxer debug: PATCallBack called
[00000295] ts demuxer debug: new PAT ts_id=26327 version=16 current_next=1
[00000295] ts demuxer debug:   * number=1 pid=66
libdvbpsi error (PSI decoder): TS discontinuity (received 2, expected  
0) for PID 66
[00000295] ts demuxer debug: PMTCallBack called
[00000295] ts demuxer debug: new PMT program number=1 version=22 pid_pcr=68
[00000295] ts demuxer debug:  * descriptor : IOD (0x1d)
[00000295] ts demuxer debug:   * es pid=68 type=27 fcc=h264
[00000275] main input debug: selecting program id=1
[00000322] main packetizer debug: looking for packetizer module: 17 candidates
[00000322] main packetizer debug: using packetizer module "packetizer_h264"
[00000322] main packetizer debug: thread 3010870160 (decoder) created  
at priority 0 (input/decoder.c:159)
[00000295] ts demuxer debug:   * es pid=69 type=15 fcc=mp4a
[00000337] main packetizer debug: looking for packetizer module: 17 candidates
[00000337] packetizer_mpeg4audio packetizer debug: running MPEG4 audio  
packetizer
[00000337] packetizer_mpeg4audio packetizer debug: no decoder specific  
info, must be an ADTS stream
[00000337] main packetizer debug: using packetizer module  
"packetizer_mpeg4audio"
[00000337] main packetizer debug: thread 3002465168 (decoder) created  
at priority 0 (input/decoder.c:159)
[00000295] ts demuxer warning: first packet for pid=68 cc=0x9
[00000295] ts demuxer warning: first packet for pid=69 cc=0xb
[00000337] packetizer_mpeg4audio packetizer: AAC channels: 2 samplerate: 44100
[00000277] main stream output debug: adding a new input
[00000278] stream_out_transcode private debug: creating audio  
transcoding from fcc=`mp4a' to fcc=`mp4a'
[00000341] main decoder debug: looking for decoder module: 24 candidates
[00000341] main decoder debug: using decoder module "faad"
[00000342] main encoder debug: looking for encoder module: 8 candidates
[00000342] ffmpeg encoder debug: libavcodec initialized (interface 3352064 )
[00000342] ffmpeg encoder error: cannot find encoder MPEG AAC Audio
[00000278] stream_out_transcode private error: cannot find encoder ((null))
[00000341] main decoder debug: removing module "faad"
[00000278] stream_out_transcode private error: cannot create audio chain
[00000337] main packetizer error: cannot create packetizer output (mp4a)
[00000322] packetizer_h264 packetizer warning: waiting for SPS/PPS
[00000322] packetizer_h264 packetizer warning: waiting for SPS/PPS
[00000322] packetizer_h264 packetizer warning: waiting for SPS/PPS
[00000322] packetizer_h264 packetizer warning: waiting for SPS/PPS
[00000322] packetizer_h264 packetizer warning: waiting for SPS/PPS
[00000322] packetizer_h264 packetizer warning: waiting for SPS/PPS
[00000322] packetizer_h264 packetizer warning: waiting for SPS/PPS
[00000322] packetizer_h264 packetizer warning: waiting for SPS/PPS
[00000322] packetizer_h264 packetizer warning: waiting for SPS/PPS
[00000322] packetizer_h264 packetizer warning: waiting for SPS/PPS
[00000322] packetizer_h264 packetizer warning: waiting for SPS/PPS
[00000322] packetizer_h264 packetizer warning: waiting for SPS/PPS
[00000322] packetizer_h264 packetizer warning: waiting for SPS/PPS
[00000322] packetizer_h264 packetizer warning: waiting for SPS/PPS
[00000322] packetizer_h264 packetizer warning: waiting for SPS/PPS
[00000322] packetizer_h264 packetizer warning: waiting for SPS/PPS
[00000322] packetizer_h264 packetizer warning: waiting for SPS/PPS
[00000322] packetizer_h264 packetizer warning: waiting for SPS/PPS
[00000322] packetizer_h264 packetizer warning: waiting for SPS/PPS
[00000322] packetizer_h264 packetizer debug: found NAL_SPS
[00000322] packetizer_h264 packetizer debug: found NAL_PPS
[00000288] main http server debug: Connection from 192.168.0.10
[00000277] main stream output debug: adding a new input
[00000278] stream_out_transcode private debug: creating video  
transcoding from fcc=`h264' to fcc=`h264'
[00000358] main decoder debug: looking for decoder module: 24 candidates
[00000358] ffmpeg decoder debug: libavcodec already initialized
[00000358] ffmpeg decoder debug: postprocessing disabled
[00000358] ffmpeg decoder debug: ffmpeg codec (h264) started
[00000358] main decoder debug: using decoder module "ffmpeg"
[00000359] main encoder debug: looking for encoder module: 8 candidates
x264 [info]: using cpu capabilities MMX MMXEXT SSE SSE2
[00000359] main encoder debug: using encoder module "x264"
[00000359] main encoder debug: removing module "x264"
[00000358] ffmpeg decoder debug: concealing 0 DC, 0 AC, 0 MV errors
  (h264 at 0x85d2e80)
[00000278] stream_out_transcode private debug: late picture skipped (5450279)
[00000278] stream_out_transcode private debug: decoder aspect is  
1152000:432000
[00000278] stream_out_transcode private debug: source pixel aspect is  
2.133333:1
[00000278] stream_out_transcode private debug: scaled pixel aspect is  
2.133333:1
[00000278] stream_out_transcode private debug: source 720x576, crop  
720x576, destination 720x576, padding 720x576
[00000278] stream_out_transcode private debug: encoder aspect is  
1152000:432000
[00000359] main encoder debug: looking for encoder module: 8 candidates
x264 [info]: using SAR=32/15
x264 [info]: using cpu capabilities MMX MMXEXT SSE SSE2
[00000359] main encoder debug: using encoder module "x264"
[00000281] stream_out_duplicate private debug: duplicated a new stream  
codec=h264 (es=68 group=1)
[00000289] main private debug: adding a new input
[00000289] mux_ts private debug: adding input codec=h264 pid=68
[00000289] mux_ts private debug: new PCR PID is 68
[00000281] stream_out_duplicate private debug:     - added for output 0

-----------------------------------------------------

Thanks for your help

Nicolas

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