BatMan - batch processing for MEncoder

[iixorbiusii]

I am probably not describing things correctly (again!)

[with the Xilisoft product, not BatMan] 32000 audio is too fast, 44100 is just slightly too slow (sound lags after 20 secs or so) and 48000 is way too slow, hence I figured if I turned the audio sample rate down a little (which would result in the audio playing faster, hence keeping up with the video), e.g 43900 for example, the audio and video would remain in sync on a Rockchip device at 25FPS. If only standard rates like 44100, 48000 etc are supported, then my idea is rubbish :cry: . I'll move on !

I'll take on board your comments and will try your suggestions.
Keep up the excellent work !!

[BobbyQ]

hehe, you favor the thought that the sample rate has something to do with the playback speed of the audio, but it has not ! :lol: That is just a very restrictive (in other words badly programmed) firmware of the player/chip if it makes sample rates other than 44100 play faster/slower than the original !
For example you can record the same 3:50 song as a 44.1kHz, a 32Khz or a 48KHz sample. It will always be 3:50 long and sound normal - if you use an appropriate playback software. Please do the above suggested and check for speed and delay.

[iixorbiusii]

Hi,

Yes, I think it is a Rockchip trait - as you say, a 1 minute piece of music at 32000 or 48000 should take 60 secs in either respect !! However in the Rockchip device, the movie audio plays fast at 32000 and slow at 48000

Well, they do only cost $50 !!

[BobbyQ]

so, what now ? do you have ANY video that plays sync on the rockchip ? Which sample rate does that one have ? I need more feedback .. can't do any own tests of my own.

[iixorbiusii]

BobbyQ,

I have plenty of movies working in sync (for over 2 hours) on the Rockchip, using the Xilisoft product at the specs I posted earlier in this forum.
In recent testing, I have 22FPS working, but the sound de-syncs after 20 mins or so ( rewind a little puts it back in sync again).

So far, no luck with Batman + Rockchip, but I will keep trying.

Cheers!!

[BobbyQ]

it should not make any difference at all if 22 fps or 20 or anything else. I have no idea what's causing the desync at all (other than crappy firmware). Could you provide me with a xilisoft converted movie (or a fragment) that plays sync on your player ? Maybe examining that could bring some light to the matter.

[iixorbiusii]

BobbyQ, I will send you a PM with a link to some short xilisoft converted movies in a day or two... Please note though, the movies all play perfectly on a PC, irrespective of FPS or audio sample rate - it's only when they are played on a Rockchip that they 'misbehave' unless they are 20FPS, 44.1kHz. I think you will only truly know / experience what I mean when/if you invest in a Rockchip player.

A good analogy is a record player - let's say a more sophisticated record player can handle 33.3, 45's and 78's by means of selecting the appropriate playback speed. It seems a Rockchip 'record player' has, let's say, just '45' as a playback option - therefore, 33.3 and 78's are either too fast or too slow.... if you get my somewhat off tangent drift!!

[BobbyQ]

I was able to eliminate a problem with XviD and thus speeding up the Qx processing by factor 3 :-D
Please get the latest beta version. Still waiting for your test results so I can adjust the settings to give smooth video and sync audio.

[BobbyQ]

there has not been much feedback from this site lately, but I tell you what's new anyway :
- use of DirectShow filters such as FFDShow with all its benefits like postprocessing, sharpening etc ..
- really smooth framerate conversion (calculates intermediate images to ensure fluent playback)

[lca77]

Dear BobbyQ, why don't you upload BatMan into the downloadsection ? By doing this you may get more feedback from the members of MyMPxPlaer.org ...
rgrds, lca77