Odd audio at MVP with some mpegs

[mvallevand]

Hans, both formats are accepted for -ab. Because of your keen eye, I thought I'd let you know and warn everyone else that if and when sub upgrades to ffmpeg 0.50 the -ar option will only accept the full version and many scripts will break

ie -ar 48k must be changed to -ar 48000

Martin

[HtV]

keen eye, keen eye.....I'm not so sure about that. Why do I need a €1000 of glasses in front of those "keen eyes" :eek:
Thanks for the compliment anyway.

Hans

[mvallevand]

Hans I expect with 640x480 resolution on a 24" screen with large fonts you will be able to help us for a long time.

Martin

[HtV]

You can probably "read" that like braille, don't you think? Because of the temperature differences of the varying colors. Maybe I just did an invention.
In real life we still are watching tv on an old fashioned 32' crt screen.
When/if we buy a flatscreen we might even go smaller in stead of bigger.
I guess we aren't member of the "default" consumer group.
e.g. I hate (don't like) audio surround systems, they are just too much for me.
otoh when it comes to beer, I don't mind one more....................

cya Hans

[mvallevand]

Touch screens aren't new, but that still could be a "red hot" idea.

A 32 foot screen WOW.

Martin

[HtV]

Believe it or not: I checked in your post if it should be single or double quotes.:o:o

Thank you and good night,

Hans

[Dave72]

Your sample doesn't play on mvpmcx2 and GBPVR shows it as only 1 second length both showing signs of timeline issues in the file. I couldn't even play it with PVRx2 or MPC on my PC and with VLC the timeline jumps all over the place.

With ffmpeg this error is pretty clear it is a bad transcode

Code:

Seems stream 0 codec frame rate differs from container frame rate: 59.94 (60000/1001) -> 29.97 (30000/1001)

Very odd. On my pvrx2, the timeline is fine, as is the audio (clean anyhow), but the pic goes all rainbow blocks. VLC plays fine(A&V), but the timeline bar snaps to the end right away, even though it plays through..

Now, the ffmpeg error.. I get that error when I open pretty much any of my Miro downloaded files (all sorts of formats from mov to mp4 etc). I thought it was just.. normal.. lol

So the prob is really my source files !??


Here's a MediaInfo scan of a source file from Miro

General
Complete name : E:\Download\Miro\Rocketboom--HD-\thanksgiving-special_hd.m4v
Format : MPEG-4
Format profile : Apple TV
Codec ID : M4VH
File size : 77.1 MiB
Duration : 3mn 7s
Overall bit rate : 3 450 Kbps
Encoded date : UTC 2009-11-25 22:59:40
Tagged date : UTC 2009-11-25 22:59:44

Video
ID : 2
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L3.1
Format settings, CABAC : No
Format settings, ReFrames : 2 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 3mn 7s
Bit rate mode : Variable
Bit rate : 3 328 Kbps
Width : 960 pixels
Height : 540 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 29.970 fps
Resolution : 24 bits
Colorimetry : 4:2:0
Scan type : Progressive
Bits/(Pixel*Frame) : 0.214
Stream size : 74.4 MiB (96%)
Language : English
Encoded date : UTC 2009-11-25 22:59:40
Tagged date : UTC 2009-11-25 22:59:44
Color primaries : BT.709-5, BT.1361, IEC 61966-2-4, SMPTE RP177
Transfer characteristics : BT.709-5, BT.1361
Matrix coefficients : BT.709-5, BT.1361, IEC 61966-2-4 709, SMPTE RP177

Audio
ID : 1
Format : AAC
Format/Info : Advanced Audio Codec
Format version : Version 4
Format profile : LC
Format settings, SBR : No
Codec ID : 40
Duration : 3mn 7s
Bit rate mode : Constant
Bit rate : 116 Kbps
Nominal bit rate : 128 Kbps
Channel(s) : 2 channels
Channel positions : L R
Sampling rate : 44.1 KHz
Resolution : 16 bits
Stream size : 2.60 MiB (3%)

[mvallevand]

I just downloaded that source from Miro, and I followed my recommendation to you in another thread to create a DVD compliant file and it plays quite nicely.

Code:

-i magma-walk-through_hd.m4v -target ntsc-dvd -acodec mp2 -ab 192 -ac 2 -ar 48000 -b 4096k -r 29.97 -s 720x480 -vcodec mpeg2video test.mpg

Martin

[Dave72]

That string seems to work.

I dont recall the previous thread you mentioned, but I did have an old -target string rem'd out in my ini file (of my converter app), I guess I tried it but might have had one of the other options wrong (I think I had updated to ffmpeg 0.5 around then too ?)

Thanks for your time with this.

[mvallevand]

Here was my reply to your question. http://forums.nextpvr.com/showthread.php?t=44819

Martin