MPEG2 help

[biferi]

I Converted one of my videos to MPEG2. and I used a Bit Rate of 512 kbps.

I used Any Video Converter.

I opened the video in Mediainfo and anything for Bit Rate it is all over the place.

For Video Bit Rate Mode it says Variable.

Then a little bit down the page it says Video Bit Rate 512 kbps.

Why does it say Variable for Video Bit Rate Mode?

I Uploaded the Text File.

[DB83]

It actually states that the Maximum Video Bitrate is 512 kbps

The converter will have applied bitrate up to the entered maximum so you see the avergae bitrate is 503 kbps.


Nothing unusual in that although (subject to content) 503-512 is incredibly low and might give playback issues.

[biferi]

Why does it say Video Bit Rate Mode is Variable?

I selected 512 from the Drop Down List.

[jagabo]

The selection of variable vs. constant is separate from the selection of the bitrate. You got variable bitrate presumably because you asked for it. Ie, you didn't specify constant birate.

[Skiller]

And even then it's not fixed to exactly 512 Kbits per second during a period of one second throughout the video (unless by coincidence) because the GOP structure is not bound to seconds and the amount of bits needed varies with every frame type (I, P and B). (Well it can be archived by encoding below the requested bitrate and then adding padding bits, but that's really stupid.)

That being said a video at full D1 resolution in MPEG2 at that bitrate is ought to be full of artefacts unless maybe it's a still frame.

[biferi]

I will be Watching the videos on a Projector.

I want to keep the File Size Low so I can get a lot of them on my SD Card.

What is the Lowest Bit Rate I can use for MPEG2. and still have good Picture?

PS I do not see anyplace in the Settings for VBR or CBR in Any Video Converter.

Can anybody help?

[DB83]

How can we answer that without knowing the content.

For anime or other forms of animation that bitrate might suffice.


Yet for D1 (ie 720*480) ,and with action, anything less that 3,500 kbps will probably give issues. The storage and method of relay is irrelevant.

[defbiz]

I will be Watching the videos on a Projector.

I want to keep the File Size Low so I can get a lot of them on my SD Card.

What is the Lowest Bit Rate I can use for MPEG2. and still have good Picture?

Does your projector support any other video codecs? If you're using MPEG-2 at 512kbps, I'd suggest VCD quality (352x288 PAL/240 NTSC) or Half D-1 (352x576 PAL /480 NTSC)
VCD quality is less likely to cause any issues, it will make your video look blurrier but at least it won't be as blocky as the higher resolutions. I use it to burn entire TV show seasons on DVD, depending on how long the episodes are. Half D-1 is acceptable at a bitrate of 1.4mbps-2mbps

[jagabo]

If you're using MPEG-2 at 512kbps, I'd suggest VCD quality (352x288 PAL/240 NTSC) or Half D-1 (352x576 PAL /480 NTSC)

VCD's 352x288 at the standard 1150 kbps is already compromised in quality. I recommend simply not using MPEG2 at 512 kbps. Unless it's a slideshow.

[Cornucopia]

Sounds like you are using a projector that is older, and/or cheaper, and is severely compromised in internal playback options, and instead of supplying it with an external source player that is flexible (where you could use h264, h265, etc codecs, and mp4, mkv, etc containers) via HDMI, you are falling back on relying on those mediocre internal features of the projector and its constraints. You are doing yourself a disservice.


Scott