Sound Works on some DVD players, not on others

[Bill345]

I've created several DVDs using CD & DVD Picture Show 3.0. No real problems except one - the music plays fine on some DVD players, but not on others. The video part works fine on all DVD players that can handle the DVD+ discs, it's just the audio part that doesn't always work.

Yes - it's MP3, but I'm creating the MP3 files myself from WAV files.

Any thoughts about what might cause this?

Thanks in advance,

Bill

[bryave]

Could it be possible that some DVD players can't support the audio format you've made? Or maybe the sound files are compressed many times and causes this problem. ^_^

[Bill345]

Could be - I certainly don't know.

The music files are only compressed 1 time prior to being used by the CD & DVD Pictureshow program. That is when I create them from the WAV file. (Unless WAV also does a compress. That would be another compression point I guess).

The music files are embeddened into the DVD video track by the program. Is this a compression point as well?

Oh well, I don't have any ideas on what to do, if anything, about this. I thought about creating a DVD-, to see if it works different then a DVD+.

Thanks for your reply.

Bill

[mt si guy]

I've also noticed this. I have created DVDs that can be played on just about any player that supports the + type, but the sound doesn't always come through.

[Bill345]

I sent a private message asking THoff to look at this thread. THoff is very active in the Video Studio forum. Here's the reply that I received:

I've never used that program myself, but it must produce standard DVDs in order to play on common standalone DVD players.

That means that your source audio files will need to be converted to a DVD-compliant audio format. Going from WAV to MP3 doesn't help you save disk space, and in fact is not a good idea because you are unnecessarily converting to a lossy audio format (MP3) before once again converting to a DVD audio format.

That leads us to the audio format you use for the DVD. If you are in a NTSC country, you can use LPCM (which is lossless), or AC-3 (which is lossy, but delivers quality equivalent to LPCM while consuming a fraction of the space). In PAL countries, you can use LPCM or MPEG2 audio. MPEG2 audio is also lossy.

If you are in a NTSC country and are using MPEG2 audio in attempt to save disk space, you are producing disks that are not compatible with the DVD standard, and will likely not play on most standalone players or on computers that don't have an AC-3 Dolby Digital decoder installed.

I believe that the comment about MP3 not saving space refers to the final DVD product. I'm in the USA, a NTSC country. The video files that I use are MPEG2. I'm not sure whether how CD DVD Picture Show creates the audio files using music input files.