This is another discussion that developed out of a previous thread. I
made some digital recordings of standard definition TV using a pcHDTV
HD-5500. They play fine on my PC and the standard Myth frontend.
When I play them on the mvpmc, however, there is no audio. When I
bring up the audio stream menu, its empty. Here is the output of
mvpmc from a telnet window:
switch_hw_state(): changing from 1 to 2
fullscreen video mode
screensaver disable
Changing to aspect 0, afd 0
Video aspect reported as ZERO - not changing setting
audio write thread running
video write thread running
opened /video/2775_20070109200000.mpg
Freeing PAT Decoder
Initializing PAT Decoder
write threads released
auto detection transport stream returned 1
Lost Sync
screensaver disable
libdvbpsi error (PSI decoder): TS discontinuity (received 2, expected
0) for PID 0
Decoding Program Association Table
prog 1 pmtpid 53
Initializing PMT Decoder
libdvbpsi error (PSI decoder): TS discontinuity (received 2, expected
0) for PID 53
Decoding Program Map Table
pcr_pid = 2368
Elementary Stream type 2 has pid 2368
Allocating ipack 0 to pid 2368; forcing streamid to 0xe0
Elementary Stream type 129 has pid 2369
Descriptor Tag:0a Data:65 6e 67 00
Elementary Stream type 129 has pid 2370
Descriptor Tag:0a Data:73 70 61 00
found 1 video streams; 0 audio streams; 0 subtitle streams
audio stream 0xc0 not found
Stuart, regarding your post below, I believe the stream is in fact
MPEG2, not MPEG4, so it should be okay. The TV that I have the MVP
hooked up to is just a secondary TV in the bedroom with internal
stereo speakers. So I wouldn't really care if it was just plain
stereo, as long as I can hear it. Is there a way that I can have
MythTV automatically transcode the digital recordings to have both an
AC3 audio stream and a stereo audio stream? That might be an
acceptable workaround. But I'd be interested in knowing whether mvpmc
might support this in the future without a workaround.
There's also some weird things happening with aspect ratio. Its a 4:3
TV, and wide screen programming is running off the screen to the
right. I'll have to see if adding the aspect ratio command line
parameter fixes that.
On 1/10/07, stuart <[EMAIL PROTECTED]> wrote:
> I also do not get sound on the MVPMC while watching Standard Definition
> digitally recorded TV. Actually, I was very surprised MVPMC was able to
> decode the video. I had thought digital TV was MPEG4 and that MVPMC is
> only capable of doing MPEG2. Evidently, some digital TV or perhaps
> Standard Definition programming is encoded as MPEG2. G, I think the
> sound is AC3 and may not be... hey, wait a minute... we can set up the
> MPVMC to pass through AC3 data... ...I'll try it... ...well that didn't
> work. I wonder if the MVPMC / mythTV feature is using the same audio
> code as the file browser (which I just tested w/an AC3 audio file - and
> it worked). As I was saying, G, I think to get sound you will need to
> transcode the AC3 to something MVPMC expects.
>
> I also tried an HDTV (720) recording and got nothing. Just a blank
> screen. However, I was pleased that MVPMC did not crash. I was able to
> back out of playing the recording and start another show.
>
> I understand some people have had success with symbolic links to their
> HDTV files but renaming the links to <file_name>.dvx. Then, playing
> them through VLC. I know, lots of hoops and a high pain level w.r.t.
> ease of use - but it sounds like a way to view these digital files on
> the MVPMC box.
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