Export Video as AVI

Jamil-Taylor wrote on 2/27/2024, 11:45 PM

I have a video that is 1920x1080p with a 23.976 framerate. I exported this video using File|Export movie|Video as AVI... I did not change any default settings, and I set the file name to my D: drive with an AVI extension. The AVI video used the Intel IYUV codec, that has a perfect image quality. I have no complaints about the video quality.

My understanding is that AVI has undergone improvements via OpenDML that allow for larger file sizes. My question is how can I enable OpenDML AVI support in Video Pro X15 version 21.0.1.205? It looks like it is not being used, because my movie export resulted in two files being created. One being over 700GB, and a second one with a file name ending in _0001.avi that was about 200 or 300 GB in size.

Why did I export to AVI you may be wondering. I wanted to use DivX Pro to convert the video and reduce the size. I still used DivX Pro and simply added both files with the option to append as a single video. The two files being created was unexpected and curious. Is there an option I may have missed to enable OpenDML AVI support? My understanding was that OpenDML AVI was for supporting videos over 2GB. I also had an audio track that most likely pushed the size limit over 2GB resulting in two files being created.

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Comments

AAProds wrote on 3/2/2024, 8:28 PM

@Jamil-Taylor

Jami, I don't want to appear to be rude but it appears you don't understand the relationship between bitrate and file size. At a set bitrate and over a set time, there can only be one file size, regardless of the program or codec used (there can be minor differences, as John has pointed out, but the differences are marginal). I proved that above with my example.

The file is slightly larger only due to a change in audio codec.

Not so. The reason that file is only "slightly larger" is because it is 40 minutes shorter (2hr 58min). Had it been the length of the original video (3hr41min), at a bitrate of 8220, it probably would be 13-14GB.

The only way to determine if a particular process (yours being to AVI>DivX or mine, direct to HEVC) is "better" is to create a file of each using same bitrate (resulting in the same file size) and then subjectively comparing them for visual quality. You will then be able to say the DivX route is better (or the same, or worse).

One last thing; a smaller file is not better. A smaller file means less data is stored and therefore less detail is kept. If you want better quality, you have to increase the file size (by increasing the bitrate). That said, different codecs are more "efficient", meaning for the same visual quality, they are smaller/use less bitrate. For example, HEVC/H265 is better than AVC/H264 because it has a better compression system, meaning for the same visual quality, the file size is smaller. This may be the case with DivX verses HEVC, but we haven't done that comparison yet. I certainly wouldn't blindly believe the marketing that DivX is better than anything else without actually testing it against exactly the same video encoded by another codec such as HEVC.

CubeAce wrote on 3/2/2024, 9:21 PM

@Jamil-Taylor

Hi.

I am curious as to why no-one so far has asked for the MediaInfo data on the original file you are trying to copy. The reason for why the program produced two files may lie in that information.

Ray.

johnebaker wrote on 3/3/2024, 5:42 AM

@Jamil-Taylor

. . . . The only way to determine if a particular process (yours being to AVI>DivX or mine, direct to HEVC) is "better" is to create a file of each using same bitrate (resulting in the same file size) and then subjectively comparing them for visual quality. . . .

I am in agreement with @AAProds.

I now have DivX installed.

Exporting as AVI then converting to HEVC using DivX and exporting direct from VPX with the appropriate bitrate settings to achieve the same bitrate and file size as the DivX conversion, is, IMHO, time-consuming for no gain.

In VPX I exported, to AVI file format, a short, high detail video clip, for conversion using DivX (default HEVC settings), and a direct export to HEVC setting the Ave and Max bitrates to achieve the same bitrate as the DivX conversion and got the following results:

DivX:- Ave bitrate: 4226 kb/s, file size: 82.6 MB
VPX :- Ave bitrate: 4365 kb/s, file size: 85.4 MB

Settings used: Ave bitrate set to 4200, Max bitrate 5000

These are identical encoding formats, and as you can see, the differences are minimal.

. . . . At a set bitrate and over a set time, there can only be one file size, regardless of the program or codec . . . .

As you can see, the increase in bitrate vs file size are within ~1% of each other

Playing back both video clips on PC monitor and 52" TV show no difference in visual quality between the DivX conversion and the VPX direct export.

John EB