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TOPIC: Codec not supported

Re: Codec not supported 7 years ago #8913

  • drkuli
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  • 7 years ago
It seems that the only difference between 25 and 50 fps in the above example is in converted file's header. Possibly because of the method of counting used. I suspect we are dealing with 1080p (sf), take a look here.

@shaunthesheep. Good work Mediacoder is more and more promising each day of testing it.
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Last Edit: 7 years ago by drkuli.

Re: Codec not supported 7 years ago #8916

  • funkytwig
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  • 7 years ago
Greg_E wrote:
The Mpeg at 100mbps should be a pretty decent codec to use, just keep in mind that on many USB connected disks this is about all the speed you are going to get from them (12.x MBps) so that would be single stream of playback. Mpeg at 50mbps might be a better choice for some people.


OK, I guess 100mbps is fairly similar to ProRes but I thought 50mbps was acceptable to BBC so is it not a bit OTT. I guess my thing is I am talking about TV and corporate not high end (i.e. Film). BTW is Mpeg 100mbps 10bit colour depth (is it mpeg 1,2,3,4? Ime not exactly a hard core techie when it comes to codecs).

Re: Codec not supported 7 years ago #8918

  • funkytwig
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  • 7 years ago
shaunthesheep wrote:
OK, I think I have found the right audio settings in Mediacoder to convert from .mts to .mp4 with 5.1 surround AC-3 audio transcoded to 5.1 surround sound AAC. The video re-wrapped. The resulting file plays in VLC with both picture and sound OK. LW imports both video and all 6 surround sound audio tracks into LW at the same time from the mp4 file thus eliminating the need to use Audacity.


Wow is it always 5.1? I generally don't use the internal microphone. I generally plug in a mono microphone for most things. Does LW even handle 5.1?

Re: Codec not supported 7 years ago #8919

funkytwig wrote:
shaunthesheep wrote:
OK, I think I have found the right audio settings in Mediacoder to convert from .mts to .mp4 with 5.1 surround AC-3 audio transcoded to 5.1 surround sound AAC. The video is re-wrapped (no transcoding). The resulting file plays in VLC with both picture and sound OK. LW imports both video and all 6 surround sound audio tracks into LW at the same time from the mp4 file thus eliminating the need to use Audacity.


Wow is it always 5.1? I generally don't use the internal microphone. I generally plug in a mono microphone for most things. Does LW even handle 5.1?


Well, LW appears to be able to import and extract 6 tracks of audio from a single mp4 file and so I am guessing it does support 5.1. LW was originally designed for film editing and feature films, for example, do sometimes use surround sound.
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Last Edit: 7 years ago by shaunthesheep.

Re: Codec not supported 7 years ago #8920

I have just imported the same mp4 file with LW's transcode function using the default MPEG I-frame HD/AVI at 250 MB bitrate setting. The bitrate choice is 50 MB-250 MB. It took 13 minutes for a 2 min 38 sec clip to import and the footage plays back smoothly in LW. I was importing from my desktop on an internal HDD. If you are importing from an external USB drive use 50 MB as Greg_E suggests in an earlier post.

I suppose the advantage of this work flow is that the re-wrapped mp4 file is available for future use when LW handles long GOP inter-frame compression better but in the meantime transcoding to MPEG I-frame HD allows it to be used in LW in its current state.

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Desktop
Dell Inspiron 560MT. Intel Core 2 Quad Q8300 Processor, 6 GB Dual Channel DDR3, Windows 7 64 bit SP1/Ubuntu Studio 14.04.2 duel boot. On-board graphics chip. Samsung SyncMaster S23B35OH LED monitor. EchoAudio Mia 24/96 soundcard.

Laptop
Dell Precision M6700, i7 3740QM CPU @2.70Ghz, NVidia Quadro K3000M, 8GB ram. Windows 7 64 bit SP1.

I am not employed by EditShare. I am a Lightworks user.
Last Edit: 6 years, 11 months ago by shaunthesheep.

Re: Codec not supported 7 years ago #8921

  • drkuli
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  • 7 years ago
@funkytwig. Take a look here. It's MPEG-2 intra-frame compression. Matrox Uncompressed can be 8 or 10-bit. LW can handle six or more of audio tracks. Export is dependent of QT for Windows capabilities.
i5-2500K@4.5GHz | Asrock Z68 Extreme3 Gen3 | 2x4GB Corsair XMS3 | Radeon HD4850 1GB GDDR3 + Intel HD Graphics 3000 | 2xHP w2408h + Sony PWM14L2 | OCZ Vertex2 40 GB + 2xSamsung HD502HJ | Welland ME751 HDD dock | Liteon iHAS424 | Corsair HX520 | Sharkoon Rebel9 Eco | Win7x64Ult.
Last Edit: 7 years ago by drkuli.
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