after convertion it turns from 1920X 1080 to 1920 X 1088?

[trasit]

Hi, I converted a 1920X 1080 video to MP4 using Formatfactory
I notice the height of the video was changed from 1080 to 1088, what happened?

Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42
File size : 745 MiB
Duration : 3mn 20s
Overall bit rate mode : Variable
Overall bit rate : 31.2 Mbps
Encoded date : UTC 2014-01-29 13:58:32
Tagged date : UTC 2014-01-29 14:03:19
Writing application : mp4creator 1.6.1d

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L5.0
Format settings, CABAC : No
Format settings, ReFrames : 1 frame
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 3mn 20s
Bit rate mode : Variable
Bit rate : 30.9 Mbps
Width : 1 920 pixels
Height : 1 088 pixels
Original height : 1 080 pixels
Display aspect ratio : 16:9
Original display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 25.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.592
Stream size : 740 MiB (99%)
Language : English
Encoded date : UTC 2014-01-29 13:58:32
Tagged date : UTC 2014-01-29 14:03:18

Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 3mn 19s
Bit rate mode : Variable
Bit rate : 231 Kbps
Maximum bit rate : 260 Kbps
Channel count : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Compression mode : Lossy
Stream size : 5.48 MiB (1%)
Language : English
Encoded date : UTC 2014-01-29 14:03:19
Tagged date : UTC 2014-01-29 14:03:19

[davexnet]

Is it because the program wants to maintain mod16 ?
Perhaps you can override it in the settings.

[ndjamena]

1080 / 16 = 67.5
1088 / 16 = 68

Although you'd think it would know to leave 1080p alone.

[enim]

set your program formatfactory to encode mod8. may be Baldrick or someone who use formatfactory will assist you further about how to set formatfactory to encode mod8.

[Brad]

Did it really stretch the height? 1080p videos (including Blu-ray Discs) are usually encoded as 1088 internally, with instructions for the decoder to crop the padding.

[ndjamena]

Did it really stretch the height? 1080p videos (including Blu-ray Discs) are usually encoded as 1088 internally, with instructions for the decoder to crop the padding.

No, it didn't actually:

https://sourceforge.net/p/mediainfo/discussion/297609/thread/5651ab2d

Everything is working as it should.

[Hoser Rob]

... Although you'd think it would know to leave 1080p alone.

I'd certainly expect that ...

[hello_hello]

Whenever MediaInfo displays two values for the same thing it usually means the information written to the video stream itself and the information written to the container (MP4 in this case) aren't the same thing (or they're the same thing specified in different ways). From your example:

Width : 1 920 pixels
Height : 1 088 pixels
Original height : 1 080 pixels
Display aspect ratio : 16:9
Original display aspect ratio : 16:9

I don't use FormatFactory but if I was guessing, the video stream resolution is 1080 while the height written to the container is different, but the real question is how does the video display rather than what MediaInfo is reporting.

You could try opening it with a player such as MPC-HC and using File Properties to see what it reports as the resolution. Or you could open the MP4 with MKVMergeGUI and look under the "format specific options" tab to see what it reports for the display dimensions or aspect ratio. You could even try re-saving it as an MKV to see if MediaInfo then displays the resolution differently.

[trasit]

Hi Thanks everyone who have read my question.

I just just ued ffmpeg to show the property of this video, ffmpeg tell me it is a 1820X1080 video clip.

Duration: 00:03:20.60, start: 0.000000, bitrate: 31158 kb/s
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
1920x1080 [SAR 1:1 DAR 16:9], 30926 kb/s, 25 fps, 25 tbr, 90k tbn,
50 tbc (default)
Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp,
230 kb/s (default)

[ndjamena]

Yup, the problem is that some software has odd ways of storing the video resolution. Jerome botched up the way MediaInfo displays that info and it's been confusing people ever since.