Conversions - Video to Audio

[rickgillyon]

Is it possible to add a conversion format to Sage to produce mp3 audio files from a mpg radio recording? Would be really handy to add this to radio favourites so they are all auto-converted...

[Fuzzy]

you'd have to research the ffmpeg commands required, but I'm pretty sure you could make a custom profile that send the video to null, and outputted to an mp3 file.

[rickgillyon]

Originally Posted by Fuzzy

you'd have to research

There you go, that's where it all falls over for me...

[rickgillyon]

Okay, finally found some time to do this. Simple command, works:

ffmpeg -i <filename>.mpg -ab 128k <filename>.mp3

Any idea how this maps into a command in sage.properties like:

transcoder/formats/iPod-Fair\ Quality=f\=mp4;
MCompressionDetails\=-bufsize 33554432 -g 300;
[bf\=vid;f\=mpeg4;br\=500000;fps\=29.97;w\=512;
h\=384;arn\=4;ard\=3;][bf\=aud;f\=aac;sr\=44100;ch\=2;br\=64000;]

[BobPhoenix]

Originally Posted by rickgillyon

Okay, finally found some time to do this. Simple command, works:

ffmpeg -i <filename>.mpg -ab 128k <filename>.mp3

Any idea how this maps into a command in sage.properties like:

transcoder/formats/iPod-Fair\ Quality=f\=mp4;
MCompressionDetails\=-bufsize 33554432 -g 300;
[bf\=vid;f\=mpeg4;br\=500000;fps\=29.97;w\=512;
h\=384;arn\=4;ard\=3;][bf\=aud;f\=aac;sr\=44100;ch\=2;br\=64000;]

Wild shot in the dark.

 
transcoder/formats/Audio-Only\ Quality=f\=mp3;MCompressionDetails\=-ab 128K;

Someone else will probably have the correct format for you.

P.S. If this actually does work let me know because I need to purchase a Lotto ticket while my luck holds.

[rickgillyon]

Thanks for that!
Had to tweak it to:

transcoder/formats/Audio-128k=f\=mp3;MCompressionDetails\=-ab 128000;

But that failed, with this line in the log:

Fri 11/5 13:49:10.329 [AWT-EventQueue-0@2af081] processOptionsMenu optionsMenu=default:BASE-50504|OptionsMenu:Conversion Started Dialog
Fri 11/5 13:49:10.334 [Ministry@10ee566] Set Transcode format source=MPEG2-PS 0:00:00 20 kbps [#0 Audio[MP2 48000 Hz 2 channels 160 kbps MAIN idx=0 id=c0 eng]] dest=mp3 0:00:00 0 kbps [{CompressionDetails=-ab 128000}]

Don't know how it gets that "dest=mp3 0:00:00 0 kbps" stuff...

[BobPhoenix]

Originally Posted by rickgillyon

Thanks for that!
Had to tweak it to:

transcoder/formats/Audio-128k=f\=mp3;MCompressionDetails\=-ab 128000;

Wow I should get my lotto ticket may only miss the powerball.

Originally Posted by rickgillyon

But that failed, with this line in the log:

Don't know how it gets that "dest=mp3 0:00:00 0 kbps" stuff...

Sorry but I have no ideas about that.

[rickgillyon]

Hmmm, this seems to be working:

transcoder/formats/Audio-128k=f\=mp3;[bf\=aud;f\=mp3;sr\=44100;ch\=2;br\=128000;]

Produces an mp3, but doesn't play on my phone, or on mediamonkey. Can only get it to play on WMP...

[starfire]

Originally Posted by rickgillyon

Is it possible to add a conversion format to Sage to produce mp3 audio files from a mpg radio recording? Would be really handy to add this to radio favourites so they are all auto-converted...

Does this help?

[rickgillyon]

Originally Posted by starfire

Does this help?

Thanks, that would have saved me some time...

But the lines are identical but for the bitrate and name:
transcoder/formats/Audio-128k=f\=mp3;[bf\=aud;f\=mp3;sr\=44100;ch\=2;br\=128000;]
transcoder/formats/MP3-384CBR=f\=mp3;[bf\=aud;f\=mp3;sr\=44100;ch\=2;br\=384000;]

So does ffmpeg just produce mp3 that isn't very compatible/standard?

[TBacker]

I found out the hard way just recently that the Sage transcoder MP3 output is broken.

It will spit out an audio file with an MP3 extension, but it is really an MP2 (Mpeg 1 Layer 2) audio file internally.

While some players will read such a file (they see MP3 and just look for any MPEG audio data), most will not, or will mis-judge the format giving you either a noise burst for audio or truncated playback.

Try changing the file extension to MP2 and see if you have anything that plays it.

Myself - I need automatic MP3 export of audio from a video favorite, so I guess I have to look for some outboard means to accomplish that.

[rickgillyon]

Originally Posted by TBacker

I found out the hard way just recently that the Sage transcoder MP3 output is broken.

Damn, thanks. Did you report it as a bug?

[evilpenguin]

Sage doesn't export MP3's for licencing issues, I believe AAC is available though.

[rickgillyon]

Originally Posted by evilpenguin

Sage doesn't export MP3's for licencing issues, I believe AAC is available though.

Any ideas, this one fails every time:

transcoder/formats/AAC-96k=f\=m4a;[bf\=aud;f\=aac;sr\=44100;ch\=2;br\=96000;]

Log:

Tue 11/9 22:49:39.236 [Ministry@ddbc17] Initiating xcode for V:\pvr\AldousHuxleysBraveNewWorld-2869081-0.mpg
Tue 11/9 22:49:39.237 [AWT-EventQueue-0@c5495e] processOptionsMenu optionsMenu=default:BASE-50504|OptionsMenu:Conversion Started Dialog
Tue 11/9 22:49:39.241 [Ministry@ddbc17] Set Transcode format source=MPEG2-PS 0:00:00 20 kbps [#0 Audio[MP2 48000 Hz 2 channels 160 kbps MAIN idx=0 id=c0 eng]] dest=m4a 0:00:00 0 kbps [#0 Audio[aac 44100 Hz 2 channels 96 kbps]]
Tue 11/9 22:49:39.248 [Ministry@ddbc17] Using 5 threads for the transcoder
Tue 11/9 22:49:39.250 [Ministry@ddbc17] Ministry is waiting for 180 sec
Tue 11/9 22:49:40.250 [Ministry@ddbc17] Ministry is waiting for 180 sec
Tue 11/9 22:49:43.835 [AWT-EventQueue-0@c5495e] KillTranscoding for:MediaFile[id=2893684 A[2869081,2866332,"Aldous Huxley's Brave New World",65685@1108.18:15,15] mask=TV host=pvrecorder encodedBy=Hauppauge WinTV MOD7700 DVB-T Capture (Dev1 Path0) Radio7 format=MPEG2-PS 0:00:00 20 kbps [#0 Audio[MP2 48000 Hz 2 channels 160 kbps MAIN idx=0 id=c0 eng]] V:\pvr\AldousHuxleysBraveNewWorld-2869081-0.mpg, Seg0[Mon 11/8 18:10:00.014-Mon 11/8 18:35:00.014]]

[mevans]

Just wondered if anybody has made any progress with this at all??

[rickgillyon]

No, never worked, I just automated an external program to do the conversion for me - ffmpeg in the end did the job best.

[mevans]

Thanks for this. ffmpeg looks like an interesting program for this (and many other things!)

Would you mind sharing your script (and details of how you execute it)?

- also this is your opportunity for your 1500th post!! -

Cheers

[rickgillyon]

As you no doubt would have guessed, it's a bit complicated. I have another machine on my network that runs a job every hour, which compares recordings with a text file that contains names of shows for conversion. It then uses the web plugin to check if it's still being recorded. If the program is not being recorded and is on an audio channel (>= 700 on my setup), it fires off:

copy "%fnf%" "%tmf%%fn%.mpg"
%cur%ffmpeg -i %tmf%%fn%.mpg -ab 128k %xvf%%fn%.mp3

This effectively copies the mpg input to a temp folder and runs ffmpeg with output to my dump area. Filename is passed in and then fnf/fn set as:

set fnf=%1
if [%1] == [] goto end
c:
cd %cur%
for /F "tokens=3 delims=\." %%n in ("%fnf%") do set fn=%%n

I can send you all the scripts if you like, but as I say it's all a bit involved!

[mevans]

Thanks for the info. Sorry it has taken me so long to reply.

I did indeed suspect that things were quite involved !!

I'm gonna have a play over the next few weeks and see if i get something working.

Thanks again.