4 replies to this topic

[JerD]

I am trying to convert a mpeg2 file with the following specs:

Video: mpeg-2, 704x480, 15000kbps, 29.97fps
Audio: ac3, 48000Hz, 256kbps

Crunch seems to hang at 0% and never moves, regardless of the format I select to convert to. In the preview window I can scroll through the video and it appears fine.

Any ideas? Is there a log I can check?

TIA

[tsantee]

Something is odd with that spec. It far exceeds the maximum bit rate for MPEG 2 video used in video DVD. If that spec is accurate it may be that Crunch can't handle an MPEG 2 file that is greater than 10 mbps. Do you know what was used to encode that MPEG file?

A different possibility is that the bit rate is reported wrong. This could be due to time code breaks in the file. The application MPEG Streamclip can repair time code breaks. You have to choose Convert to MPEG in the Streamclip File menu after repairing the breaks and then use that saved file in Crunch.

[JerD]

The video file is a decoded mpeg2 file from a TiVo. It will not play in Quicktime.... just a blank white screen, even though I have the MPEG2 decoder installed.

In MPEG Streamclip, it also shows a blank white screen. When I go to File > Show Stream Info, it shows:

CODE

Type: MPEG program stream

Duration: 0:30:03
Data Size: 1.05 GB
Bit Rate: 4.99 Mbps

Video Tracks:
224 MPEG-2, 704 × 480, 4:3, 23.976 fps, 15.00 Mbps, lower field first

Audio Tracks:
128 AC3 2/0, 48 kHz, 256 kbps

Any ideas? I can convert the file using FFMpeg, but I was hoping Crunch would run faster. Now I'm just hoping I didn't waste money purchasing Crunch.

What's odd is that when I drop the video into Crunch, I can scroll through the whole thing within Crunch.

FWIW, The file plays fine using Mplayer and VLC.

[tsantee]

The video file is a decoded mpeg2 file from a TiVo. It will not play in Quicktime.... just a blank white screen, even though I have the MPEG2 decoder installed.

In MPEG Streamclip, it also shows a blank white screen. When I go to File > Show Stream Info, it shows:

CODE

Type: MPEG program stream

Duration: 0:30:03
Data Size: 1.05 GB
Bit Rate: 4.99 Mbps

Video Tracks:
224 MPEG-2, 704 × 480, 4:3, 23.976 fps, 15.00 Mbps, lower field first

Audio Tracks:
128 AC3 2/0, 48 kHz, 256 kbps

Any ideas? I can convert the file using FFMpeg, but I was hoping Crunch would run faster. Now I'm just hoping I didn't waste money purchasing Crunch.

What's odd is that when I drop the video into Crunch, I can scroll through the whole thing within Crunch.

FWIW, The file plays fine using Mplayer and VLC.

Note that Streamclip says the overall bit rate (video + audio) is 4.99 Mbps while the video bit rate is 15.00 Mbps. That's mathmatically impossible. You don't mention if you tried to fix timecode breaks. That seems the best explanation for this. Everything else looks okay.

[JerD]

I tried fixing the timecodes in Streamclip and that didn't make a difference. It scanned through the whole thing and said '0 timecode breaks' the whole time.

I'm just not sure why Mplayer & VLC play it fine but anything quicktime based chokes on it.

Ah well, I guess I'm giving up for now. Thanks for the ideas!