[mythtv-users] 2x playback with transcoded recording

[Greg]

I've had the same problem with Myth .11 as well. It seem to have
something to do with the samplerate of the audio. The transcode profile
was set to 44100 but I believe the default profile was set to 32000 at
the time of the recording. The transcode apparently doesn't determine
the audio bit rate, and copies the audio without re-encoding and sets
the samerate to whatever the transcoder profile has at the time. I don't
know if any work has been done in cvs to make the transcoder a bit
smarter.

Greg

On Sat, 2003-09-06 at 03:13, Naoyuki Tai wrote:
> After transcoding, the playback becomes twice as fast, for both audio
> and video.
> 
> So far, it has happened twice.
> 
> 
> I used very standard record setting.
> +----+-----------+------------+------------+
> | id | name      | videocodec | audiocodec |
> +----+-----------+------------+------------+
> |  1 | Default   | MPEG-4     | MP3        |
> |  2 | Live TV   | MPEG-4     | MP3        |
> |  3 | Transcode | MPEG-4     | MP3        |
> +----+-----------+------------+------------+
> 
> 
> +---------+--------------------------+-------+
> | profile | name                     | value |
> +---------+--------------------------+-------+
> |       1 | width                    | 352   |
> |       1 | height                   | 480   |
> |       1 | rtjpegquality            | 170   |
> |       1 | rtjpeglumafilter         | 0     |
> |       1 | rtjpegchromafilter       | 0     |
> |       1 | mpeg4bitrate             | 2400  |
> |       1 | mpeg4maxquality          | 2     |
> |       1 | mpeg4minquality          | 15    |
> |       1 | mpeg4qualdiff            | 3     |
> |       1 | mpeg4scalebitrate        | 0     |
> |       1 | mpeg4optionvhq           | 1     |
> |       1 | mpeg4option4mv           | 0     |
> |       1 | hardwaremjpegquality     | 100   |
> |       1 | hardwaremjpeghdecimation | 4     |
> |       1 | hardwaremjpegvdecimation | 4     |
> |       1 | samplerate               | 44100 |
> |       1 | mp3quality               | 7     |
> |       2 | width                    | 352   |
> |       2 | height                   | 480   |
> |       2 | rtjpegquality            | 170   |
> |       2 | rtjpeglumafilter         | 0     |
> |       2 | rtjpegchromafilter       | 0     |
> |       2 | mpeg4bitrate             | 2400  |
> |       2 | mpeg4maxquality          | 2     |
> |       2 | mpeg4minquality          | 15    |
> |       2 | mpeg4qualdiff            | 3     |
> |       2 | mpeg4scalebitrate        | 0     |
> |       2 | mpeg4optionvhq           | 1     |
> |       2 | mpeg4option4mv           | 0     |
> |       2 | hardwaremjpegquality     | 100   |
> |       2 | hardwaremjpeghdecimation | 4     |
> |       2 | hardwaremjpegvdecimation | 4     |
> |       2 | samplerate               | 44100 |
> |       2 | mp3quality               | 7     |
> |       3 | width                    | 352   |
> |       3 | height                   | 480   |
> |       3 | rtjpegquality            | 170   |
> |       3 | rtjpeglumafilter         | 0     |
> |       3 | rtjpegchromafilter       | 0     |
> |       3 | mpeg4bitrate             | 2000  |
> |       3 | mpeg4maxquality          | 2     |
> |       3 | mpeg4minquality          | 15    |
> |       3 | mpeg4qualdiff            | 3     |
> |       3 | mpeg4scalebitrate        | 0     |
> |       3 | mpeg4optionvhq           | 1     |
> |       3 | mpeg4option4mv           | 1     |
> |       3 | hardwaremjpegquality     | 100   |
> |       3 | hardwaremjpeghdecimation | 4     |
> |       3 | hardwaremjpegvdecimation | 4     |
> |       3 | samplerate               | 44100 |
> |       3 | mp3quality               | 7     |
> +---------+--------------------------+-------+
> 
> 
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