Charles Simonson
Forum Replies Created
-
Yep, you will need a different encoder. Flip4Mac Episode (Compression Master), Digigami MegaPEG, or Mainconcpet Encoder will allow you to encode at your desired size.
-
Flip4Mac has different applications for different encoding needs. I don’t know if what you have is the original F4M product, which would be the WMV Studio line, or their new product which was aquired from Popwire which they have renamed Episode. If it is a WMV Studio product, then all this will afford you is the ability to encode WMVs (Windows Media). If it is an Epsiode product, and you also have a license for the separate Flash 8 encoder, then you can encode FVLs within Episode, but not Compressor or QT.
-
Everyone is correct in that your bit rate is much too low for the resolution you are encoding to. I would say that anything at your resolution @ 1200kbps and below will experience dropped frames at 25fps. Almost every WM encoder that I know of is based on the same WM SDK, so this issue will not be resolved with other encoders available in this price range.
But some things that you could try are the following. 1.) Use the WVC1 advanced profile encoder (not the WMVA or WMV3 encoder). This encoder will take better advantage of your settings and while I would still expect dropped frames, there shouldn’t be as many. 2.) Set your buffer size to something like 5 – 10 secs. This will affect how soon a client can tune into the stream, but it allow more bits to be allocated during your tricky sequences. 3.) Try setting your keyframes to 6 secs. A lower keyframe count will generate a better encode quality-wise, but this setting should help in making sure there are less dropped frames. 4.) Make sure you are selecting adaptive deinterlace and not just leaving this alone. 5.) I forget if ProCoder has a complexity setting for WMV, but if it does, then set that anywhere from to 0 – 2. With a decent enough bit rate and the above settings, a CBR encode should look pretty decent.
-
The only thing that I can think of that might help is using an app like Episode (Compression Master) and either encoding to MPEG-2 with it or first converting the source from 10bit to 8bit there and then using Compressor to encode to MPEG-2. Compressor could be having an issue with the 10bit to 8bit color conversion, and Episode does a much better job in this regard than QT.
-
Well SDI is all digital, so no worries there. While you can use software, in almost every case that I know of, using software to convert from file to file would be much slower than outputting over SDI and recapturing the downconverted-on-the-fly SD SDI signal.
-
What I do with a Kona board is downconvert and play out the 720p sequence to SD SDI and then either print that to tape as 480i or recapture on another station. This is very fast and accurate.
-
The 4:2:2 profile can be used in an IP or IBP mode and at much lower bit rates, but you are correct that it will not be decoded on a standard DVD STB.
-
It seems like you are getting a pretty good sized encode off of your settings. While I am generally quite happy with the results of Compressor 2’s (v.1’s encoder sucked though) at SD bit rates, if you really want better quality, the only option may be using a different encoder. There are many recent reports here describing better encoders for MPEG-2. Also, if your source is 480i, compress to 480i and view the encode on a BVM or TV like your DVD is intended. Do not trust your desktop display for accurate playback quality.
-
Are you sure the Sony processor isn’t trying to create 6 channels on playback? On my Sony receiver, it has a direct source mode that is the only method that does no processing on the output.
-
First, DVD doesn’t support an all I-frame mode. You can store an all I-frame encode on a disc, but it must be used only as a file, not as a disc that is compatible in STBs. Second, the recommendations of MainConcept and ProCoder are highly backed.