TwoFlower will not play streaming MPEG-4

[fly135]

We have been using VLC to play streaming MPEG-4 for years. With the release of 2.0.1 it no longer can decode the frames as indicated in the messages.

The MPEG-4 is in an RTP packet. Neither RTSP or SAP, which are both supported will work.

[VLC_help]

Can you share us the messages? And maybe a sample URL?

[fly135]

I can't share a URL because this is multicasting from a hardware streaming MPEG-4 encoder. Here is a list of the messages when the stream is started. Never had a problem with any previous version.

main debug: adding item `rtsp://192.168.5.132' (URL deleted )
qt4 debug: Adding a new MRL to recent ones: rtsp://192.168.5.132
main debug: rebuilding array of current - root Playlist
main debug: rebuild done - 1 items, index -1
main debug: processing request item:(URL deleted ), node: null, skip: 0
main debug: resyncing on(URL deleted )
main debug:(URL deleted ) is at 0
main debug: starting playback of the new playlist item
main debug: creating new input thread
main debug: Creating an input for (URL deleted )
main debug: no fetch required for (null) (art currently (null))
main debug: using timeshift granularity of 50 MiB, in path 'C:\Users\John\AppData\Local\Temp'
main debug: (URL deleted )gives access `rtsp' demux `' path `192.168.5.132'
main debug: creating demux: access='rtsp' demux='' location='192.168.5.132' file='\\192.168.5.132'
main debug: looking for access_demux module: 1 candidate
live555 debug: version 2011.12.23
live555 debug: RTP subsession 'video/MP4V-ES'
main debug: selecting program id=0
live555 debug: setup start: 0.000000 stop:0.000000
live555 debug: play start: 0.000000 stop:0.000000
main debug: using access_demux module "live555"
main debug: TIMER module_need() : 33.768 ms - Total 33.768 ms / 1 intvls (Avg 33.768 ms)
main debug: looking for decoder module: 31 candidates
qt4 debug: IM: Setting an input
avcodec debug: libavcodec initialized (interface 0x360a64)
avcodec debug: trying to use direct rendering
avcodec debug: allowing 4 thread(s) for decoding
avcodec debug: ffmpeg codec (MPEG-4 Video) started
avcodec debug: using frame thread mode with 4 threads
main debug: using decoder module "avcodec"
main debug: TIMER module_need() : 19.221 ms - Total 19.221 ms / 1 intvls (Avg 19.221 ms)
main debug: looking for meta reader module: 2 candidates
lua debug: Trying Lua scripts in C:\Users\John\AppData\Roaming\vlc\lua\meta\reader
lua debug: Trying Lua scripts in C:\Program Files (x86)\VideoLAN\VLC\lua\meta\reader
lua debug: Trying Lua playlist script C:\Program Files (x86)\VideoLAN\VLC\lua\meta\reader\filename.luac
main debug: no meta reader module matching "any" could be loaded
main debug: TIMER module_need() : 2.654 ms - Total 2.654 ms / 1 intvls (Avg 2.654 ms)
main debug: `rtsp://192.168.5.132' successfully opened
main debug: Buffering 0%
main debug: Buffering 3%
main debug: Buffering 6%
main debug: Buffering 10%
avcodec warning: cannot decode one frame (8475 bytes)
main debug: Buffering 13%
avcodec warning: cannot decode one frame (9048 bytes)
main debug: Buffering 16%
avcodec warning: cannot decode one frame (8718 bytes)
avcodec warning: cannot decode one frame (8301 bytes)
main debug: Buffering 20%
main debug: Buffering 23%
.
.
.
avcodec warning: cannot decode one frame (8833 bytes)
main debug: incoming request - stopping current input
main debug: dying input
main debug: control: stopping input
main debug: dying input
avcodec warning: cannot decode one frame (8720 bytes)
main debug: removing module "avcodec"
avcodec debug: ffmpeg codec (MPEG-4 Video) stopped
main debug: killing decoder fourcc `mp4v', 0 PES in FIFO
main debug: removing module "live555"
main debug: Program doesn't contain anymore ES
main debug: dead input
qt4 debug: IM: Deleting the input

[VLC_help]

Does it work any better if you limit FFmpeg threads to 1?
http://wiki.videolan.org/WindowsFAQ-2.0 ... r_laggy.29

[fly135]

I will give that a try. I need to investigate more. On a different version of our streaming encoder it works. I am now suspecting that it has something to do with the SDP data. Will report back when I know more.

John A

[Titanic]

Setting the FFMPEG thread count to 1 solved this issue for me.

[Jean-Baptiste Kempf]

Known issue.

[Titanic]

Is there an automatic way to install VLC with the FFmpeg thread count setting set to 1? I'm asking because otherwise we do have to handle a lot of customer requests telling us that VLC can't play our mp4v/mp4a RTP stream when they only need to change this setting.

[Jean-Baptiste Kempf]

Yes, deploy the vlcrc with the right tag. Or help us (finance) a fix for this issue.