RF HDTV Modulator for DVHS VCR with built in ATSC tuner - Page 4 - AVS Forum
Forum Jump: 
 1Likes
Reply
 
Thread Tools
post #91 of 93 Old 07-28-2014, 11:39 AM
Senior Member
 
ADTech's Avatar
 
Join Date: Jun 2010
Location: St Louis
Posts: 429
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 11 Post(s)
Liked: 27
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!

Tech support for Antennas Direct
ADTech is offline  
Sponsored Links
Advertisement
 
post #92 of 93 Old 07-29-2014, 09:29 PM
Newbie
 
Join Date: Jul 2014
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 1
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
Attached Images
File Type: jpg stefvie.jpg (139.7 KB, 17 views)
stefvie2k is offline  
post #93 of 93 Old 08-01-2014, 05:32 AM
Newbie
 
Join Date: Jul 2014
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 1
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
sneals2000 likes this.

Last edited by stefvie2k; 08-01-2014 at 05:51 AM.
stefvie2k is offline  
Reply HDTV Technical

User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off