jonasmattsson
n00b
Joined: 20 May 2004
Posts: 71
Location: Gothenburg, Sweden
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 Posted: Mon Jan 02, 2006 12:02 pm Post subject: can i alter the nominal bitrate in an ogg vorbis header? |
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I wonder if there is an easy way to change the nominal bitrate in the vorbis-header. you see, i'm having some problems on my portable media player (iaudio x5), the length of an ogg-vorbis file calculated by the player is not related to the reality, i realized that the proprtions of the error was almost exact the same as the proportions betwen the nominal bitrate and the average one, i.i: | Code: | | (player-reported-length/real-length) = (nominal-bitrate/average-bitrate). |
also the player sometimes clips the last few seconds of a ogg-file, i'm guessing this is related to the previous erro. so i wanted to test if the player would behave any better if i set the nominal bitrate=averge-bitrate.
I,ve tried with hexedit, to alter the bytes 0x30-0x33 from "40 9C 00 00" to "00 7D 00 00" but that only result in the following:
| Code: | # ogginfo littleTest.ogg
Processing file "littleTest.ogg"...
Warning: Hole in data found at approximate offset 4500 bytes. Corrupted ogg.
Warning: Invalid header page, no packet found
Warning: Invalid header page in stream 1, contains multiple packets
New logical stream (#1, serial: 13c49a56): type invalid
Warning: stream start flag not set on stream 1
Warning: sequence number gap in stream 1. Got page 1 when expecting page 0. Indicates missing data.
Logical stream 1 ended |
any ideas? vorbiscomment is not sufficient since the nominal bitrate is not a comment.
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