why no audio?

[Febs]

wheres the one not on wiki?

I can't make any sense out of this at all.

[mipodr]

I think fishlover means to say the "attached one." VLC-transcode.txt file that you asked him to change to .bat . Which is "the one" not on the wiki.

Although I might be totally wrong...

[fishlover900]

ive changed the extention but when i drag a file on it a cmd open then closes straight after. Nothing happens to the video

[gnu]

The batch file doesn't work for me, I get this error:

access_output_file error: cannot open `' (No such file or directory)
stream_out_standard error: no suitable sout access module for `file/ps://(null)'
stream_out_transcode error: cannot create chain
main error: stream chain failed for `transcode{vcodec=mp2v,vb=600,width=176,height=128,acodec=mp3,ab=128,samplerate=44100}:std{access-video=file,mux=ps,c:\temp\1.mpg}'
main error: cannot start stream output instance, aborting

I've resetted my VLC settings, and I still get this error. If I do it manually, it works

[fishlover900]

what do you mean manually, what you writing and where. I dont mind doing it manally if it just works!

[gnu]

I mean when I don't use the batch file, but set all the streaming options myself!

[gnu]

OK I fixed it, you need this in your batch file:

"c:\programs\vlc.exe" %1  --sout=#transcode{vcodec=mp2v,vb=600,width=176,height=128,acodec=mp3,ab=128,samplerate=44100}:std{access-video=file,mux=ps,url=%1.mpg}

You'll need to adjust the path to your VLC, the height and the width!

[fishlover900]

what options do you use, is there any chance of a step by step guide as when ive tried to do it manually the video comes out all jerky

[AndrewTheArt]

OK, as I understand it... The m2v format will NOT accept audio, therefore making the batch script on the mpgplayer useless for converting to a video+audio file. Therefore, a different container is necessary to house the audio+ vudeo

My NOT WORKING modded script contains...

Code: [Select]

@echo off

set WIDTH=320
set HEIGHT=240
 
"C:\Program Files\VideoLAN\VLC\vlc.exe" %1 --sout=#transcode{vcodec=mp2v,vb=600,width=%WIDTH%,height=%HEIGHT%,acodec=mp3,ab=128,samplerate=44100}:std{access-video=file,mux=ps,url=%1.mpg}
... as suggested by user "gnu" above.
However, this simply outputs an audio file, no video.  

[AndrewTheArt]

SUCCESS!!!! Using gnu's awesome program (http://forums.rockbox.org/index.php?topic=8150), I was able to find the correct settings to go from mp4 to vid+audio mpg.

Code: [Select]

@echo off

"C:\Progra~1\VideoLAN\VLC\vlc.exe" %1 --sout=#transcode{vcodec=mp2v,vb=320,height=240,fps=25,acodec=mp3,ab=180,samplerate=44100}:std{access-video=file,mux=ps,url=%1.mpg}

Simply type that in a batch file to go from .mp4 to .mpg. This particular code is optimized for an iPod video.

[gnu]

How many fps do you get when you play the video on your ipod?

[AndrewTheArt]

Horrible amount. I selected "Show FPS" but the slow FPS were screwing up the display of the number. My GUESS though is like 10-15 or less, probably much much less.

[gnu]

Have you got a nano? I've one and I have ~9-10 fps...

[AndrewTheArt]

I'm using an iPod video (but as you very well know, in terms of video power, essentially it's like a Nano, because the ipods video coprocessor is not used by RockBox currently).

So I don't even know if there would be a different in FPS, unless the Video had some RAM advantage.

[Llorean]

FPS is actually mostly determined by video size. So clearly a fullscreen video for the 320x240 screen of the iPod Video is going to be a LOT slower than the 176x132 (really 176x128 is what the video will be) screen on the Nano.

Plus it depends on whether you're using the coprocessor patch or not.