by Quu » Wed Aug 25, 2010 11:38 am
I sent a PM to Nostromo asking permission to use one of the clips.
I am going to focus, right now, on encoders... i have two synthetic videos, and hopefully at least one non synthetic (maybe more... anybody have example videos that think would be a good test for encoders, sync, and playback?) that i can use
I am going to test MPEG-2 Video MP@HL and MPEG-4 AVC H.264 High/4.2 and MPEG-4 AVC High10/4.2 (I see that x264 supports the 10 bit high profile). I am going to test with flac audio, mpeg-2/3 audio, and aac audio... max settings for each one. Finally I am going to use MPEG-2 PS/TS, MPEG-4 Part 15 (.mp4), and Matroska decoding
As far as known issues...
A/V Sync - some encoders don't agree with decoders for a/v sync, same with muxers vs demuxers
A/V Drift - some encoders add audio drift as the the file is player, so I will test late in the file for this (5 minutes+)
seeking - We do not use seek at conventions, so I will not be testing for proper seeking
chapters/editions - this is not a concern for amv playback at conventions, will not be tested
blocking - if the decoders is able to properly decode the video, will look for differences in the expected and decoded video
I would like to also test audio quality and video quality, but i don't have an objective way to do that... psnr or asnr can be gamed
Lead me not to temptation, for I have deadlines