Cannot find codec matching selected -vo and video format 0x10000002

[ltd82]

Hello there guru's

I need some help with mplayer, I'm a windows user in process of migration to ubuntu 10.04. Go slow on me

Here is a command I'm trying

mplayer ./source.mpg -af resample=48000:0:0,volnorm=1:0.25 -ao pcm:file=./source.mpg_temp.wav -vc dummy -vo null

The above command is a part of a script i'm trying to write.

Here is the error I'm getting in the log file just after the above is executed and my output is without sound.

Cannot find codec matching selected -vo and video format 0x10000002.

Can someone please take me through to diagnose this problem ?

[nm]

Originally Posted by ltd82

Here is the error I'm getting in the log file just after the above is executed and my output is without sound.

Cannot find codec matching selected -vo and video format 0x10000002.

That's caused by the forced "dummy" codec, which doesn't really exist in MPlayer. It shouldn't affect audio output though.

Try this instead:

mplayer ./source.mpg -af resample=48000:0:0,volnorm=1:0.25 -ao pcm:fast:file=./source.mpg_temp.wav -vc null -vo null

Does mplayer play back audio from your file if you don't use -ao pcm?

[ltd82]

Originally Posted by nm

Try this instead:

Ok i changed to

mplayer ./source.mpg -af resample=48000:0:0,volnorm=1:0.25 -ao pcm:fast:file=./source.mpg_temp.wav -vc null -vo null

Now the error is this

           ************************************************
           **** Your system is too SLOW to play this!  ****
           ************************************************

Possible reasons, problems, workarounds:
- Most common: broken/buggy _audio_ driver
  - Try -ao sdl or use the OSS emulation of ALSA.
  - Experiment with different values for -autosync, 30 is a good start.
- Slow video output
  - Try a different -vo driver (-vo help for a list) or try -framedrop!
- Slow CPU
  - Don't try to play a big DVD/DivX on a slow CPU! Try some of the lavdopts,
    e.g. -vfm ffmpeg -lavdopts lowres=1:fast:skiploopfilter=all.
- Broken file
  - Try various combinations of -nobps -ni -forceidx -mc 0.
- Slow media (NFS/SMB mounts, DVD, VCD etc)
  - Try -cache 8192.
- Are you using -cache to play a non-interleaved AVI file?
  - Try -nocache.
Read DOCS/HTML/en/video.html for tuning/speedup tips.
If none of this helps you, read DOCS/HTML/en/bugreports.html.

No it's not slow. I'm sure about this.

root@ubuntu:~# cat /proc/cpuinfo
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 23
model name	: Intel(R) Core(TM)2 Extreme CPU Q9300  @ 2.53GHz
stepping	: 10
cpu MHz		: 1600.000
cache size	: 6144 KB
physical id	: 0
siblings	: 4
core id		: 0
cpu cores	: 4

Originally Posted by nm

Does mplayer play back audio from your file if you don't use -ao pcm?

mplayer source.mpg plays the file just fine.

Any other recommendations ?

[nm]

Originally Posted by ltd82

Now the error is this

           ************************************************
           **** Your system is too SLOW to play this!  ****
           ************************************************

No it's not slow. I'm sure about this.

This error message is due to losing A/V sync because of the -ao pcm:fast parameter. Again, the error can be completely ignored when dumping audio.

The question is, did it produce an audio file or not?

Originally Posted by ltd82

mplayer source.mpg plays the file just fine.

Can you hear the audio with this command:

mplayer ./source.mpg -af resample=48000:0:0,volnorm=1:0.25 -vc null -vo null

[ltd82]

Originally Posted by nm

This error message is due to losing A/V sync because of the -ao pcm:fast parameter. Again, the error can be completely ignored when dumping audio.

The question is, did it produce an audio file or not?

yes I have source.mpg_temp.wav created and it plays fine. But the final output file doesn't have audio.

Here are the next commands being executed.

neroAacEnc -br 48000 -he -if ./source.mpg_temp.wav -of ./source.mpg_temp.mp4
MP4Box -add source.mpg_temp.264#video:fps=25.000 source.mpg.m4v
MP4Box -add source.mpg_temp.mp4#audio source.mpg.m4v
MP4Box -inter 500 -itags album=na:artist=na:comment=na:created=na:name=na -lang Hindi source.mpg.m4v

It could be a problem with one of these commands ?

Can you hear the audio with this command:

mplayer ./source.mpg -af resample=48000:0:0,volnorm=1:0.25 -vc null -vo null

Yes I can hear the audio and here is the output if this may help.

junaid@ubuntu:~/Desktop/conversion/new$ mplayer ./source.mpg -af resample=48000:0:0,volnorm=1:0.25 -vc null -vo null
MPlayer SVN-r32011-4.4.3 (C) 2000-2010 MPlayer Team

Playing ./source.mpg.
MPEG-PS file format detected.
VIDEO:  MPEG2  720x576  (aspect 2)  25.000 fps  6000.0 kbps (750.0 kbyte/s)
==========================================================================
Forced video codec: null
Opening video decoder: [null] Null video decoder
Movie-Aspect is undefined - no prescaling applied.
VO: [null] 720x576 => 720x576 Planar YV12 
Selected video codec: [null] vfm: null (NULL codec (no decoding!))
==========================================================================
==========================================================================
Opening audio decoder: [mp3lib] MPEG layer-2, layer-3
AUDIO: 48000 Hz, 2 ch, s16le, 384.0 kbit/25.00% (ratio: 48000->192000)
Selected audio codec: [mp3] afm: mp3lib (mp3lib MPEG layer-2, layer-3)
==========================================================================
AO: [pulse] 48000Hz 2ch s16le (2 bytes per sample)
Starting playback...
A:  12.6 V:  12.6 A-V:  0.005 ct: -0.267 311/311  0%  0%  0.7% 0 0 


MPlayer interrupted by signal 2 in module: sleep_timer
A:  12.6 V:  12.6 A-V:  0.004 ct: -0.267 312/312  0%  0%  0.7% 0 0 

Exiting... (Quit)

[nm]

Originally Posted by ltd82

yes I have source.mpg_temp.wav created and it plays fine. But the final output file doesn't have audio.

Here are the next commands being executed.

neroAacEnc -br 48000 -he -if ./source.mpg_temp.wav -of ./source.mpg_temp.mp4
MP4Box -add source.mpg_temp.264#video:fps=25.000 source.mpg.m4v
MP4Box -add source.mpg_temp.mp4#audio source.mpg.m4v
MP4Box -inter 500 -itags album=na:artist=na:comment=na:created=na:name=na -lang Hindi source.mpg.m4v

It could be a problem with one of these commands ?

Yes, the problem is either in those steps or in the player that you use for playing back the final file.

I couldn't reproduce the issue though; both audio and video played back fine when using your commands.

Let's take one step at a time:
1. Can you hear audio when playing back the source.mpg_temp.mp4 file produced by neroAacEnc? If not, the problem is there.
2. If the AAC MP4 file is fine but the resulting M4V isn't, what does MPlayer print to the terminal when you try playing the M4V file?

[ltd82]

I tried that but couldn't fix the gpac problem but ffmpeg did the trick.

Thanx a lot for the help, really appreciate it.