Issue reprocessing a video that I rendered myself

judelaw wrote on 10/2/2018, 7:02 PM

Good evening everyone,

I'm having an issue with Sony Vegas pro 13. I need to reprocess some old videos, nearly not editing anything on it. Those were videos that I rendered back then to a quite high bitrate. Here are the specs of one of them in the "details" tab of the file properties: Length: 2mn49s, size :355mb, extension :*.avi, size:720by1280, bitrate:1328082 kbits/s. Audio : 2304kbits/s, channels : 2(stereo), 48kHz.

Although quite big in size, the original plays without any problems with MPHC, but is hard to read if I put it in the Vegas timeline (even if I set the video setting of Vegas to match the media). And when I render it to a new video (having changed practically nothing to the timeline), then MPHC is having the same hard time reading the re-rendered video as Vegas was just having reading the original video (original video that played perfectly fine in MPHC).

So why is MPHC having such a hard time ? To go more into more details, the problem is the same in Vegas and in MPHC : The video seems to read ok but if while reading I go to read another part of the video with my mouse pointer, then the audio plays well but the video take about 5 seconds to display anything.

Here are the rendering options that I selected in Vegas for the reprocessing (I think that those settings were also the settings I used back then when I created the original video with Vegas also) : HD 720-60p, using Sony YUV codec. OpenDML compatible. Audio: 48 000 Hz; 24 Bit; Stereo; PCM
Video: 29,970 fps; 1280x720 Progressive; Xvid, Pixel Aspect Ratio: 1,000 frame size : HDV720 (720x1280) Framerate: 29,970 (NTSC) NONE (progressive scan) pixel aspect :1.000 Video format :xvid mpeg-4 Codec Interleave every (seconds) :0.250 Box checked: create an open DML (Avi version 2) compatible file Audio : PCM uncompressed, 48000 hz 24 bits stereo.

 

Comments

NickHope wrote on 10/2/2018, 9:31 PM

I suggest you avoid Xvid for your new renders. Strangely, Xvid cropped up yesterday.

What are you planning to do with the newly-rendered files?

To get your existing files playing more smoothly, if I recall correctly, there are alternative Xvid decoders. FFdshow can decode Xvid. That might perform better than the official Xvid codec (or other decoders you might find) but takes a little bit of understanding and setting up. Some on the forum frown on it as being in the same boat as codec packs but it's never caused me a problem.

Otherwise read this. You might end up having to use proxies.

To be sure what format your existing files are, use MediaInfo.

judelaw wrote on 10/2/2018, 9:59 PM

I just need to crop the end of my videos, just about 10 miliseconds, that's all I need, that's the only modification I need to do, nothing else. maybe a simple software could do that without to much difficulty and without damaging anything.

judelaw wrote on 10/2/2018, 10:04 PM

yes, I'm looking for a better format to encode my videos for some time anyway ( https://www.vegascreativesoftware.info/us/forum/converting-source-files-with-handbrake-which-cpu-friendly-format--112851/#ca699446 ) so I probably wont do any new renderings with xvid, provided I find what I need: Cpu friendly, around 100mb per minute file size for 720p 30fps. At least now I know what I want, I just have to find it.

fr0sty wrote on 10/2/2018, 11:58 PM

AVC is your friend. In Vegas 13 I think it was listed under Mainconcept AVC.

Systems:

Desktop

AMD Ryzen 7 1800x 8 core 16 thread at stock speed

64GB 3000mhz DDR4

Geforce RTX 3090

Windows 10

Laptop:

ASUS Zenbook Pro Duo 32GB (9980HK CPU, RTX 2060 GPU, dual 4K touch screens, main one OLED HDR)

judelaw wrote on 10/3/2018, 12:32 AM

Does it render 720p 30fps at around 100mb per minute?

fr0sty wrote on 10/3/2018, 12:35 AM

It renders 720p30 at variable bit rate between 8-16 megabits per second, which at the largest end of that spectrum would clock in around 120mb, so 100mb is realistic. It also comes with the benefit if being playable on almost anything.

Last changed by fr0sty on 10/3/2018, 12:36 AM, changed a total of 1 times.

Systems:

Desktop

AMD Ryzen 7 1800x 8 core 16 thread at stock speed

64GB 3000mhz DDR4

Geforce RTX 3090

Windows 10

Laptop:

ASUS Zenbook Pro Duo 32GB (9980HK CPU, RTX 2060 GPU, dual 4K touch screens, main one OLED HDR)

judelaw wrote on 10/3/2018, 1:27 AM

Thank you Frosty!

So I have to choose 16 megabits if I want 120mb per minute of footage, that's pretty cool ! How about options in the template ?

"Almost anything" Do you mean that even users with a crappy computer could have a smooth preview (how about then If I add somme effetcs on it ?, Not stuff like colour-grading, but rather special effects, (I plan on using after effect in the near future).
Or do you just mean that players can play it easily ? Because then it wouldn't be such a incredible thing I guess, no ?

judelaw wrote on 10/3/2018, 10:52 PM

"I just need to crop the end of my videos, just about 10 miliseconds, that's all I need, that's the only modification I need to do, nothing else. maybe a simple software could do that without to much difficulty and without damaging anything."
Sorry to quote myself, but does anyone know of a software that could do that ? Just remove a few seconds of lenght at the end of a video without touching the rest of the video whatsovever ?, Not changing the format, not changing anything, not reprocessing.

Marco. wrote on 10/4/2018, 3:50 AM

FFmpeg or Vegasaur. But video will always be trimmed in full frame grid.

judelaw wrote on 10/4/2018, 6:40 AM

Thank you Marco, what does "full frame grid" means ?

Marco. wrote on 10/4/2018, 7:18 AM

Trimming steps are dependend on the fps value. A video with 25 fps can be trimmed only every 40 ms, 50 fps every 20 ms. Only a video with 100 fps could be trimmed with 10 ms preciseness.

judelaw wrote on 10/4/2018, 9:37 AM

Well, 40ms is perfectly fine. But xvid seems to be hard to edit with any software.

judelaw wrote on 10/4/2018, 9:42 AM

Some programs pretend to be able to trim without re-encoding, I don't know if it's true. I'll try with Vegasaur, thanks !

judelaw wrote on 10/5/2018, 1:20 AM

AVC is your friend. In Vegas 13 I think it was listed under Mainconcept AVC.

But can I use AVC wih uncompressed pcm 48000 24 bit ? I will never compromise on audio.

judelaw wrote on 10/5/2018, 1:25 AM

No, I tried, I can't find a way to change the audio to pcm.

judelaw wrote on 10/5/2018, 1:26 AM

Do I really have to stick with xvid ?

judelaw wrote on 10/5/2018, 1:30 AM

Totally forgot about that audio matter, I need: uncompressed PCM audio, Cpu friendly, around 100mb per minute file size for 720p 30fps, maybe I star a new topic and get more answers.

Marco. wrote on 10/5/2018, 4:14 AM

FFmpeg and Vegasaur smart trim work fine with Xvid, though I would not use this codec at all.