RF HDTV Modulator for DVHS VCR with built in ATSC tuner - Page 4 - AVS Forum
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post #91 of 101 Old 07-28-2014, 11:39 AM
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That's not an issue. I guess I'll go see how much change is in the console of my car and in the couch cushions. This looks like a really inexpensive project!

Thanks!

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post #92 of 101 Old 07-29-2014, 09:29 PM
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Just a quick update... using sox, FFmpeg and OpenCaster, I'm getting closer to being able to generate a test pattern that'll be ATSC compliant. When playing through the card, it doesn't seem to get broadcast but that might be due to some PIDs that I have that I shouldn't.

Here's a screen shot of what TSReader sees...

Still have some testing to do but once I hammer out the loose ends, hopefully I'll have something that I can use to pump out valid data.

Steph
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post #93 of 101 Old 08-01-2014, 05:32 AM
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Hi All,

So I managed to create a test pattern with a 400Hz test tone and got it playing properly through all my TVs. For those that are curious, I'm using the following under Ubuntu 14.

- sox for generating audio tone
- ffmpeg for creating audio and video elementary stream (AC3 stereo and mpeg2video)
- opencaster 3.2.2 for converting and muxing the elementary streams

I'll refine my bash script a bit and post it if others are curious.

My TS specs are:
Audio: AC3 2 channel at 48KHz and 192k bitrate
Video: MPEG-2 1080i at 7Mbps
Muxed Data:PAT, PMT, MGT, TVCT

Right now, I just use the HDTV998 program to play my generated ATSC transport stream and it's all good!

Next is to see if I can do live stuff and use the existing program to send it to the card, if that works, there's no need to develop new software.

Cheers,

Stephane
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post #94 of 101 Old 08-27-2014, 11:52 AM
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Do you have the whole thing working under Linux or are you just generating the video files under there?

I'm very interested in those undocumented functions and would also love to see your BASH script. I'm also really curious how you found all the undocumented functions...
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post #95 of 101 Old 09-30-2014, 02:55 PM
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It's taken me about 6 months, but I've finally wired up my house to work with video output from an HDTV998 card. Got a sample file to play, but I'm having trouble converting my own video.

What tools and settings are people using to convert video to fit the ATSC standard to make it playable on these cards?
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post #96 of 101 Old 09-30-2014, 03:47 PM
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See my post 66 in this thread.
John
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post #97 of 101 Old 10-01-2014, 11:53 AM
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Quote:
Originally Posted by ctdish View Post
See my post 66 in this thread.
John
I've read this thread several times and somehow managed to gloss over that every time, despite you referencing the post at least one other time as well.

Thanks for your patience. I'll have to test that out.

For completeness' sake, has anyone else come up with another method?
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post #98 of 101 Old 10-02-2014, 11:35 AM
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Does anyone have the SDK for this card? The API has a bunch of function declarations, but real source would make coding something easier. I've found a few decompilers that can kind of generate some from the player, but it's just not the same...
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post #99 of 101 Old 10-05-2014, 07:25 PM
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So, I had some time this weekend to mess with some coding a new player. (Boo! Go away, cold weather!)

It was a good exercise to keep my VB.Net skills up, since I'm no longer programming in it every day as my day job...

I've attached a ZIP file with the source code and the compiled EXE. This was done in VB.Net in Visual Studio Express 2013, so you'll need the .Net Framework 4.5 to run it.

It's very raw, but there were a couple things I saw in the API that I thought would be really nice to implement:
  • Pause
  • Fast Forward
  • Rewind

It saves settings from the last time you ran the file. But in making it do that, I couldn't figure out how to get playlists that would save and let you set the start/end percentage. If anyone has any ideas on how to do that, let me know. Or, since I've included the source, just make the changes and post it so we can all benefit!

Mark
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post #100 of 101 Old 10-10-2014, 07:59 PM
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OK, I've had a little time to play with this some more. It's a lot more polished now, though still far from perfect...

I've got playlists working as well as loading/saving on start/exit.

I've also uploaded the code to a repository on Google Code:

https://code.google.com/p/hdtv998-player/

And I've attached the newest compiled EXE. Same external file requirements as before, which I still haven't provided.

Let me know what you think and if you have any questions!
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post #101 of 101 Old 10-14-2014, 06:01 PM
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Just to let you know, I am very interested in your work but time has not been on my side. Whenever I get a chance to give it a look, I promise that I will!

- Trip

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Comments are my own and not that of the FCC (my employer) or anyone else.

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