Help with MP4 commands for aspect ratios

[tigerb]

I've got a 1280X720p mp4 video with either missing/incorrect aspect ratio (Display aspect ratio 2.40:1) instead of 16:9, but by using VLC's "A" I could get the video to play correctly in 16:9...but I need to do this every time I want to play the video.

I tried mp4box.exe -add "P:\T1.mp4" -par 1=16:19 "P:\New.mp4" to no avail.....please help with the right commands to use, thanks.

[Selur]

par = pixel aspect ratio
+
720p has a par of 1:1
-> -par 1=1:1
assuming 1 is the trackID of the video stream;
check with:

MP4Box -info  "P:\T1.mp4"

Cu Selur

[tigerb]

par = pixel aspect ratio
+
720p has a par of 1:1
-> -par 1=1:1
assuming 1 is the trackID of the video stream;
check with:

MP4Box -info  "P:\T1.mp4"

Cu Selur

Thanks Selur.

Windows Media Player is playing the video with black bars on top/bottom, but is playing it right @ 1280X720.

VLC, MPC Home Cinema and SMPlayer are all playing it at wide screen format...., however, as I mentioned earlier I could use the "A" aspect function of both VLC/SMPlayer to toggle the aspect ratio quickly and correctly and the video will play perfectly in 1280X720 with NO black borders on top/bottom.

The original video have these : 1280X720 @ 1706X720...has this something to do with the video not displaying correctly?

Here is the original info from MPC Home Cinema:

MediaFormat : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 535 MiB
Duration : 24mn 17s
Overall bit rate mode : Variable
Overall bit rate : 3 078 Kbps
Writing application : Lavf53.4.0

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.1
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 24mn 17s
Bit rate : 3 000 Kbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 2.40:1
Frame rate mode : Constant
Frame rate : 29.970 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.109
Stream size : 521 MiB (97%)
Writing library : x264 core 115
Encoding settings : cabac=1 / ref=4 / deblock=1:0:0 / analyse=0x3:0x133 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=6 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=2 / weightb=1 / open_gop=0 / weightp=2 / keyint=60 / keyint_min=1 / scenecut=1 / intra_refresh=0 / rc_lookahead=40 / rc=2pass / mbtree=1 / bitrate=3000 / ratetol=1.0 / qcomp=0.50 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.41 / aq=1:1.00
Language : English

Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 24mn 17s
Bit rate mode : Variable
Bit rate : 72.0 Kbps
Maximum bit rate : 96.0 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 44.1 KHz
Compression mode : Lossy
Delay relative to video : -200ms
Stream size : 12.6 MiB (2%)
Language : English


From SMPlayer:

Video Resolution
1280 x 720
Aspect ratio
2.3694
Format
H264
Bitrate
2999 kbps
Frames per second
29.970
Selected codec
ffh264
Initial Audio Stream
Format
MP4A
Bitrate
72 kbps
Rate
44100 Hz
Channels
2
Selected codec
ffaac

[Selur]

1. look at it with:

mediainfo --Full "path to file"

and look for the pixel aspect ratio
2. typical 16:9 mp4 par is 40:33 (NTSC Material) or 16:11 (PAL Material)
3. 720p normally isn't anamorphic and therefore has an pixel aspect ratio of 1:1
(if you are unsure about pixel and display aspect ratio , read: http://en.wikipedia.org/wiki/Pixel_aspect_ratio)

Cu Selur