Transcode of shared memory stream fails

Using shm access module with transcoding to http output fails to produce valid stream.

I.e.:

cvlc shm:// --shm-file=/home/yuuki/Xvfb_screen0 --shm-fps=2 -vvv --sout='#transcode{vcodec=theo,vb=800,scale=1,acodec=none}:http{mux=ogg,dst=:8080/}'

Produces a lot of messages same as in attached log.

VLC log file [part]

Added attachment:

• vlc.log

I'm not surprised. VLC sucks at low frame rates.

Patch welcome anyway.

added Component::Stream output label

Really it is doesn't matter what fps I will set (1, 2, 25, 30) - result is a same.

Actually, something is really broken with the frame size, 128 bytes makes no sense.

Make sure you've set the picture width

assigned to @Courmisch

added Component::Input: file system label and removed Component::Stream output label

changed milestone to %2.0.5

added Status::fixed label

closed

commit 22203a58 Author: Rémi Denis-Courmont remi@remlab.net Date: Tue Oct 16 18:47:35 2012 +0300

shm: fix capture with non page-size frame size (maybe fixes [#7579](https://code.videolan.org/videolan/vlc/-/issues/7579))

Original author: remi@remlab.net

Thanks for fast reaction, but it do not fix issue.

Let me explain full picture. I use Xvfb to make virtual X11 server with framebuffer mapped to file:

Xvfb :1 -screen :1 1024x800x24 -fbdir /home/yuuki &

After that I try to watch this framebuffer using VLC:

vlc shm:// --shm-file /home/yuuki/Xvfb_screen0 --shm-fps 2 --shm-width=1024 --shm-height=800 --shm-depth=32

It works acceptable. Now I try to transcode it and stream out:

cvlc shm:// --shm-file /home/yuuki/Xvfb_screen0 --shm-fps 2 --shm-width=1024 --shm-height=800 --shm-depth=32 :sout='#transcode{vcodec=theo,vb=800,scale=1,acodec=none}:http{mux=ogg,dst=:8080/}' :sout-keep

At this point bunch of "skipped picture" messages appear and no transcoding done.

removed Status::fixed label

reopened

VLC log file [full]

Added attachment:

• vlc-log.txt

Sout - not me. Patch welcome.

unassigned @Courmisch

added Component::Stream output Version::master git labels and removed Component::Input: file system label

changed milestone to %Bugs paradize

Attached patch to fix this issue.