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7th July 2002, 03:05 | #1 | Link |
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joint stereo always better than stereo?
sorry ive read teh advanced ref for dvd2svcd but I'm still unclear about something. Is joint stereo always a better option than jsut plain stereo or would a certain scenario call for one or the other?
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8th July 2002, 14:13 | #2 | Link |
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Hi beerbaron,
if you want to have a Dolby Sourrond Pro Logic compatible Stereo (4.0) Downmix then you have to choose "Stereo" because in "Joint Stereo" mode this is not possible as it destroys the surround information. Joint Stereo is the way to go if you only want Stereo - it can "shift" additional bitrate to the desired channels on the left and the right when there's for example only sound on the right and nothing on the left so it does not make sense to encode the "empty" channel with the same bitrate as with the other one. Hope this helps, Gerti
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8th July 2002, 16:18 | #3 | Link |
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but mp2 js encoding is far from perfect and even at low bitrates (eg, 96kbps) stereo will sound better than joint stereo so basically there's no reason to use js in mp2's right now. Until they put as much work into it as the LAME developers did, it will introduce some unwanted artifacts.
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8th July 2002, 20:46 | #6 | Link |
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in fact, LAME's joint-stereo is different than and mp2enc&tooLame's joint-stereo and will Always be better.
if you'll search for an old thread here, you'll find out that mp2 joint stereo is actually intensity stereo.
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8th July 2002, 21:14 | #7 | Link | |
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Quote:
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8th July 2002, 22:49 | #8 | Link |
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when using the extrapolation plugin, joint-stereo is the way to go.
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8th July 2002, 23:58 | #11 | Link |
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9th July 2002, 22:42 | #13 | Link |
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i thought there used to be, but it looks like it's not there anymore, but just copy the BeSweet command-line from the dvd2svcd log and paste it to a batch file, changing m s to m m, then run the batch file. As I've suggested before, check the "edit avs file" so the process stops to give you a chance to do the audio manually.
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14th July 2002, 23:32 | #14 | Link |
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Ok,
after downloading the plugin and reading the bypack sheet, I still feel somewhat lost. Here is what I am up to: I have a DVD with a single Dolby Digital 1.0 audio track. I want to keep the bitrate very low. I have set to Joint Stereo at 96, hoping that it might be comparable to stereo at 192. If I don't get any replies, I will run a besweet gui and convert the ac3 to mono, then replace files and restart with muxing and see what happens. Encode will need about 6 hours anyway. I am trying to figure out what that plugin would do? Double data rate by creating a stereo from Mono? Or feeding two chanals from one data chanal? |
17th April 2003, 03:03 | #15 | Link |
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I Choose Stereo
Hi all,
This is the first time I post. My self still confuse which sound is the best. But for the safety and good finished, I will stick with stereo. Here the informations I found from the net about stereo and joint stereo. Hopefully is usefull for you guys... http://docs.real.com/docs/xingtech/acat_t_guide.pdf http://www.modatic.net/audio/stereo_vs_jointstereo.php ---------------------- - ...keep singing... - ---------------------- |
8th June 2004, 13:52 | #16 | Link | |
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Quote:
Anyway I tried this solution above and it does not work for me. the result is that the Encoded MP2 file is exactly half the length of the Extracted WAV and has the 'chipmunk' sound. (in other words no change). I know how to manually solve this problem before using DVD2SVD but i would prefer to use the least amount of steps as possible. Here is the content of my Batch file; "C:\Program Files\DVD2SVCD\BeSweet\BeSweet.exe" -core( -input "D:\videocaptures\Extracted_audio_1.wav" -output "D:\VIDEOC~1\Encoded_audio_1.mp2" -logfile "D:\VIDEOC~1\Encoded_audio_1.log" ) -ota( -g max ) -shibatch( --rate 48000 ) -2lame( -e -b 96 -m m ) as you can see i changed "-m s" to "-m m". So it seems that there needs to be another option included or change and that is beyond me? Thankyou. |
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9th June 2004, 18:08 | #17 | Link |
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I can't reproduce this. I tried a mono wav file with your commandline, only changinf the input and output paths and ended up with a perfect mono mp2 stream.
May sound painfully obvious but does the extracted audio.wav file sound OK or have you only checked the original capture file and the encoded audio file? Basically I saved the audio from a 1-min avi I have out of vDubMod, converting to mono. Since BeSweet worked fine on that you might want to try saving the audio from your file as a wav out of VDubMod and running your commandline on that. Last edited by Nick; 9th June 2004 at 18:11. |
10th June 2004, 15:25 | #18 | Link | |
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Quote:
Have recaptured at 48000khz and its OK now, and I can run my batch file (as prev quoted) and it does the Job. Except that this has caused a noticeable interlace problem. Not a strong point for me, so time to go back to the search button. mIght try swap fields in capturing or Telecide in DVD2SVCD. cheers |
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