The VideoLAN Forums

Posted: **07 Mar 2007 16:44**

I have an Xacti camera which records MP4 files directly to an SD card, when I play these files in VLC instead of Quicktime it only plays the top left quarter of the video. It should be 640x480 but I reckon I'm only seeing 320x240 ish from the top left corner. Any ideas why?

Posted: **12 Mar 2007 21:44**

Hi, I experienced the same problem when I tried to play videos from my camera Olympus C-770UZ in .mp4 format, resolution 640x480.
VLC plays only left top corner, i.e. resolution 320x240. Problem is with both 0.8.6 and 0.8.6a version.

When I use older version 0.8.5 it displays full 640x480 pixels. Nevertheless in Stream Media Info there is information: "Stream 0: Resolution: 320x240"

At this moment I can recommend you to use older version. If anyone can explain reasons of this problem, please help.

Posted: **12 Mar 2007 22:05**

MP4 is a container. What's the format???

Posted: **13 Mar 2007 17:31**

Sorry. Here is info from VLC:

Stream 0
-Codec: mp4v
-Language: English
-Type: Video
-Resolution: 320x240
-Frame rate: 29.970029

Stream 1
-Codec: mp4a
-Language: English
-Type: Audio
-Channels: 2
-Sample rate: 48000 Hz
-Bits per sample: 16
-Bitrate: 1536 kb/s

As I mentioned before video is made by Olympus C-770UZ camera in resolution 640x480. Thank you for your advise.

Posted: **13 Mar 2007 22:36**

That's most likely a bug on our side. Could you upload a sample video + a text file explaining the problem (or just put this forum thread's url in the text file) on ftp://streams.videolan.org/incoming/? Once you've uploaded make sure to post a reply to this thread so we remember to look at the naughty file.

Posted: **14 Mar 2007 18:13**

Hi, sample file and text file was uploaded to <ftp://streams.videolan.org/incoming/mp4v wrong resolution/>
Thanks

Posted: **17 Mar 2007 19:40**

Hi,
I have a Xacti and got the same problem, both in VLC and with MPlayer (under Ubuntu) : the image, 640x480, was resized 320x240

I've finally found an answer on this topic : viewtopic.php?t=30045

Your camera produce mp4 files with wrong information inside the moov box/atom, remux your file with MP4Box ( http://gpac.sf.net )

MP4Box -isma -add oldFile.mp4 output.mp4

I downloaded GPAC, and MP4Box corrected the problem !-)
I've also wrote a small script in order to change all of the *.mp4 I got :

Code: Select all

#!/bin/bash

while [ $# -gt 0 ]; do
	picture=$1
	mp4_file=`echo "$picture" | sed 's/\.\w*$/.mp4/'`
	MP4Box -isma -add "$picture" 2"$mp4_file"
	shift
done

Posted: **10 Nov 2007 17:31**

I experienced the same problem when I tried to play videos from my camera Olympus C-770UZ in .mp4 format, resolution 640x480. VLC plays only left top corner, i.e. resolution 320x240. Problem is with both 0.8.6 and 0.8.6a version.

I have the same model of Olympus. I fixed this by:

Settings
Preferences
Input/Codecs
Demuxers
Tick the Advanced Options checkbox
Select FFmpeg demuxer in the dropdown

Thanks to http://www.gnurou.org/blog/gnurou/2007/ ... cti_videos.

The VideoLAN Forums

VLC only plays top left corner of Xacti MP4 files?

VLC only plays top left corner of Xacti MP4 files?

left top corner only - .mp4 file

Re: left top corner only - .mp4 file