Opened 18 years ago
Closed 18 years ago
#2115 closed patch (fixed)
MP3 encoding of captured audio produces static on PowerPC linux machines.
| Reported by: | Owned by: | danielk | |
|---|---|---|---|
| Priority: | minor | Milestone: | 0.20 |
| Component: | mythtv | Version: | head |
| Severity: | medium | Keywords: | mp3 ppc endian |
| Cc: | Ticket locked: | no |
Description
I have the mythbackend running on a linux ppc machine--a powermac g4 (digit audio revision) running Ubuntu dapper. Using a Plextor PX-TV402U-NA I am able to record TV with uncompressed audio fine but using mp3 encoding produces static. I have tracked the problem to an endian issue in NuppelVideoRecorder?. It looks like the audio is read from the sound card as 16-bit little endian data; this raw audio data is sent directly to lame library for encoding, but the lame library expects data in system byte-order. Swapping the bytes in the audio before sending the audio to lame fixes the problem. I have attached a patch that fixes the issue for big endian machines.
Attachments (2)
Change History (6)
Changed 18 years ago by
| Attachment: | fixmp3encoding.diff added |
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comment:1 Changed 18 years ago by
| Milestone: | → 0.20 |
|---|---|
| Owner: | changed from Isaac Richards to danielk |
| Version: | 0.19 → head |
comment:2 Changed 18 years ago by
| Type: | defect → patch |
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zdevito, can you verify that the attached 2115.patch works for you?
a patch that fixes the mp3 encoding endian issue