Geekzone: technology news, blogs, forums
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.

1068 posts

Uber Geek
+1 received by user: 55


Topic # 25776 1-Sep-2008 12:14
Send private message

Hi all

I'm having a reasonably specific problem trying to use the FFDShow h.264 (rev2079 SSE) codec to decode Freeview DVB-T signals. When I select FFDShow as my h.264 decoder, TV appears to start but there is no picture and no audio (note, I do not use the FFDShow audio decoder). I can use CoreAVC or a Cyberlink codec quite happily, however I'd rather use FFDShow since its free and open source. The problem seems to be that FFDShow is trying to use its mpeg2 decoder to try and decode the h.264 stream. I say this because when I disable the mpeg2 decoder in FFDShow video configuration, the FFDShow decoder icon no longer pops up in my taskbar when attempting to start watching tv and the actual tv stream will not start (no error, just no "playback" - I assume for lack of the video decoder). Is there anything I can do to force FFDShow to use the correct decoder (h.264 instead of mpeg2) ?

Thanks for your help


TV-Server Version: 1 RC2
MediaPortal Version: 1 RC2
MediaPortal Skin: Blue (default)
Windows Version: XP SP3 (all updates installed)
CPU Type: Intel E6600 (not overclocked)
HDD: 4 x Samsung 750GB, 1 x Samsung 640GB (some RAID, but N/A)
Memory: 2 x 1GB Corsair 6400C4 (800MHz) ddr2
Motherboard: Asus P5W DH Deluxe
Video Card: Sparkle 6600GT 128MB
Video Card Driver: Forceware 175.19
Sound Card: Creative Soundblaster Audigy 2 ZS Platinum
Sound Card Driver: (latest official)
1. TV Card: DigitalNow DNTV Live! Quattro S-T
1. TV Card Type: DVB-S, DVB-T, Analog, FM Tuner
1. TV Card Driver: (latest official)
MPEG2 Video Codec: Cyberlink
MPEG2 Audio Codec: Cyberlink
h.264 Video Codec: FFDShow/CoreAVC
Satelite/CableTV Provider: FTA Optus D2, FTA NZ Freeview (DVB-T), FTA Analog
Power Supply: Coolermaster Realpower 850W
TV: 17" Philips 170B6 LCD
TV - HTPC Connection: VGA

Create new topic
26647 posts

Uber Geek
+1 received by user: 6151

Biddle Corp
Lifetime subscriber

  Reply # 161236 1-Sep-2008 12:33
Send private message

I'll be completely frank and honest and say that you are are simply wasting your time using FFDshow. The reality is that software based decoding of H.264 content is a lost cause and you need a GPU capable of H.244 hardware acceleration and a codec that supports H.264 hardware acceleration if you want to get a decent picture.

You can spend all the time you want playing with CoreAVC or FFDShow but will not get an acceptible picture quality, particularly with 1080i content. At present your options are PowerDVD7/8 or Arcsoft Total Media Theatre.

You also need a video card capable of H.264 hardware acceleration and your 6600 isn't quite up to the job, an NVidia 8500 or greater (using the series 8 or 9 chips) is the minimum requirement.

1068 posts

Uber Geek
+1 received by user: 55


  Reply # 161272 1-Sep-2008 14:24
Send private message

Hi sbiddle

I understand what you're saying. In fact I have been seriously thinking about buying a 38* or 48* series AMD/ATI card - its just that these things cost money, and the silent ones I have found don't look like they're going to fit my mobo! (I take it that the AMD cards would support hardware decoding right?) Realistically though, if you consider picture quality on my current setup, how much of a difference would it really make to have hardware decoding? I mean, the picture seems great to me. No pixelation, smooth, detailed etc. etc... Obviously my cpu is handling a reasonable workload to achieve this - it tends to be working around 40-50% on tv3 and 30-40% on other channels. I would have thought that I would be max'ing out the cpu (or at least getting up there) before I'd start having picture quality affected. Maybe it is just the fact that I'm only sitting on a 17" monitor at 1280x1024 so I either don't see the picture quality issues, or this res doesn't stress the cpu enough to require dedicated hardware decoding. Let me know your thoughts on this...

Ignoring these issues ("for the sake of science and experimentation", if you will), I'm still wanting to try to get ffdshow going. Is there anyone who can help?

2068 posts

Uber Geek
+1 received by user: 355


  Reply # 161276 1-Sep-2008 14:35
Send private message

allstarnz posted in your other thread on this subject that he has this working - perhaps PM him.

In my experince FFDSHOW use more CPU then core when decoding .264 content, but I'm guessing you have a pretty fast CPU to only be hitting 50% on TV3.

When you live your life on Twitter and Facebook, and are only friends with like minded people on Twitter and Facebook, you are not living in the real world. You are living in a narcissistic echo chamber.


My thoughts are my own and are in no way representative of my employer.

1068 posts

Uber Geek
+1 received by user: 55


  Reply # 161278 1-Sep-2008 14:39
Send private message

Hi Geekiegeekie

CPU is as above - E6600. Stock speed, passive heatsink...

291 posts

Ultimate Geek

  Reply # 161286 1-Sep-2008 15:09
Send private message

mm1352000: Hi Geekiegeekie

CPU is as above - E6600. Stock speed, passive heatsink...

Hello -Yes, I was going to say your E6600 should be easily able to handle software decoding.

Have you tried coreavc?  While not free, it is not exacly expensive either..

FWIW, I can get coreavc running perfectly fine (ie. excellent picture/stable frame-rates) with a e4700 cpu + a AGP HD3850 ATI

"There is no way to Peace -Peace is the Way" (A. J. Muste)


1068 posts

Uber Geek
+1 received by user: 55


  Reply # 161298 1-Sep-2008 15:43
Send private message

Hi Quidam

Sorry I should have been a little clearer...

I can get MediaPortal to work fine with both CoreAVC and [an unknown version of] the Cyberlink h.264 decoder [which came free with Twinhan's DigitalTV app].

Out of interest, I would like to see if I can get FFDShow working.

The background is that I am currently trying to find a way to edit the ads out of .ts files I have accumulated from recordings. A lot of the programs I have tried have been unable to recognise the video and/or audio stream correctly. This seems to be due to the fact that there is no system-wide h.264/he-aac decoders available. I want to see if I can get the FFDShow decoder to work to see if it will allow apps to recognise the ts streams properly.

The best program I've found for editing so far has been TS Packet Editor...

4025 posts

Uber Geek
+1 received by user: 1076


  Reply # 161307 1-Sep-2008 16:07
Send private message

Hi there,
Are you using the old FFDshow builds or FFDshow Tryouts? Tryouts is an updated fork of the original, and is actively developed unlike the original.

1068 posts

Uber Geek
+1 received by user: 55


  Reply # 161316 1-Sep-2008 16:33
Send private message

Hi eXDee

I believe I'm using a derivative of the tryouts. I didn't get it direct from Sourceforge though - I got it from I use the SSE variant (because my cpu supports sse). Is this version okay? I have to confess that the sourceforge download page confuses me - I have no idea which version I should be using if I take it from there...

4025 posts

Uber Geek
+1 received by user: 1076


  Reply # 161340 1-Sep-2008 17:43
Send private message

I'd suggest either getting the latest SVN if you want the newst or getting the official release. That offical one is simply one of clsid's SVN builds that is confirmed to have no issues, im running the latest SVN one with seemingly no problems, shouldnt be much difference between the two.

Create new topic

Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:

Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:

Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:

News »

Hawaiki Transpacific cable ready-for-service
Posted 20-Jul-2018 11:29

Microsoft Dynamics 365 Business Central launches
Posted 10-Jul-2018 10:40

Spark completes first milestone in voice platform upgrade
Posted 10-Jul-2018 09:36

Microsoft ices heated developers
Posted 6-Jul-2018 20:16

PB Technologies charged for its extended warranties and warned for bait advertising
Posted 3-Jul-2018 15:45

Almost 20,000 people claim credits from Spark
Posted 29-Jun-2018 10:40

Cove sells NZ's first insurance policy via chatbot
Posted 25-Jun-2018 10:04

N4L helping TAKA Trust bridge the digital divide for Lower Hutt students
Posted 18-Jun-2018 13:08

Winners Announced for 2018 CIO Awards
Posted 18-Jun-2018 13:03

Logitech Rally sets new standard for USB-connected video conference cameras
Posted 18-Jun-2018 09:27

Russell Stanners steps down as Vodafone NZ CEO
Posted 12-Jun-2018 09:13

Intergen recognised as 2018 Microsoft Country Partner of the Year for New Zealand
Posted 12-Jun-2018 08:00

Finalists Announced For Microsoft NZ Partner Awards
Posted 6-Jun-2018 15:12

Vocus Group and Vodafone announce joint venture to accelerate fibre innovation
Posted 5-Jun-2018 10:52 to launch Kogan Mobile in New Zealand
Posted 4-Jun-2018 14:34

Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.

Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.