White at the start of every clip (Ogv)

[Pedro Lobo]

OS: Ubuntu 9.10
Openshot Version: 0.9.54 (from edge repo)

At the beginning of every clip (ogv) all I get is white for a few seconds. After a while it starts to appear normally. If I clip the video at a point where it is already displaying properly, then the beginning of the resulting clip is also white.

Forum post where another user confirms this behaviour.
http://openshotusers.com/forum/viewtopic.php?f=11&t=53&p=128#p128

[Jonathan Thomas (jonoomph)]

Is this the same bug?
https://bugs.launchpad.net/openshot/+bug/423550

[Pedro Lobo (palobo)]

No. I checked that one out before posting the bug. I doesn't flash at the end of the clip. Instead all I get is white at the beginning. If I drag the timeline all the way across the picture never shows up. It seems as if it has to buffer the image (for lack of a better explanation). When i export the clip the white is still there though.

[Jonathan Thomas (jonoomph)]

I know that MLT has some issues with Ogg files. The MLT team is aware of
them, and working to improve it.

On Sat, Dec 5, 2009 at 11:24 AM, Pedro Lobo <email address hidden> wrote:

> No. I checked that one out before posting the bug. I doesn't flash at
> the end of the clip. Instead all I get is white at the beginning. If I
> drag the timeline all the way across the picture never shows up. It
> seems as if it has to buffer the image (for lack of a better
> explanation). When i export the clip the white is still there though.
>
> --
> White at the start of every clip (Ogv)
> https://bugs.launchpad.net/bugs/492236
> You received this bug notification because you are a member of OpenShot
> Developers, which is subscribed to OpenShot Video Editor.
>
> Status in OpenShot Video Editor: New
>
> Bug description:
> OS: Ubuntu 9.10
> Openshot Version: 0.9.54 (from edge repo)
>
> At the beginning of every clip (ogv) all I get is white for a few seconds.
> After a while it starts to appear normally. If I clip the video at a point
> where it is already displaying properly, then the beginning of the resulting
> clip is also white.
>
> Forum post where another user confirms this behaviour.
> http://openshotusers.com/forum/viewtopic.php?f=11&t=53&p=128#p128
>
>
>
> _______________________________________________
> Mailing list: https://launchpad.net/~openshot.developers<https://launchpad.net/%7Eopenshot.developers>
> Post to : <email address hidden>
> Unsubscribe : https://launchpad.net/~openshot.developers<https://launchpad.net/%7Eopenshot.developers>
> More help : https://help.launchpad.net/ListHelp
>

[markusk (markuskreiner)]

i'm seeing this with mp4s. sound also mutes during this whiteout.

also the preview-thumbs of the clips are all white.

[Daniel Ellis (danellisuk)]

I have noticed this issue this morning when I exported a clip and accidentally selected 30 fps, when all my source media was 25 fps.

Exporting to a 25 fps video such as DVD PAL was fine, but exporting to DVD NTSC, introduced the white flashes at the start of each clip.

So I would guess that the white frame may be something to do with the frame rate conversion.

[Cuco3 (wadecounty)]

I'm also having the same issue with OVG files.

Also, is it just me or does the quality of OVG files degrade when loaded into OpenShot? The OVG files I created were from using the RecordMyDesktop app.

[Pedro Lobo (palobo)]

I'm not quite suer if this has something to do with it, but my OGV files were also created with RecordMyDesktop. As far as the quality degrading after importing to OpenShot, I can't really say that I noticed that.

[Cuco3 (wadecounty)]

^ Thanks for the response, Pedro. If you didn't notice it, then it didn't degrade. On my end, the video was pretty bad and the text barely readable.

[Cuco3 (wadecounty)]

OpenShot is hopefully the solution to non-linear video editing for OVG files.

Although it's not perfect (yet), other program don't even come close to OpenShot's OVG support.

[Jonathan Thomas (jonoomph)]

Ogv support will be getting better soon in MLT. I know that Dan Dennedy
(the developer of MLT) has shown an interest in improving support for that
format, especially since the HTML5 standards and what not.
Thanks,
-Jonathan

On Mon, Jan 4, 2010 at 3:52 AM, Cuco3 <email address hidden> wrote:

> ^ Thanks for the response, Pedro. If you didn't notice it, then it
> didn't degrade. On my end, the video was pretty bad and the text barely
> readable.
>
> --
> White at the start of every clip (Ogv)
> https://bugs.launchpad.net/bugs/492236
> You received this bug notification because you are a member of OpenShot
> Developers, which is subscribed to OpenShot Video Editor.
>
> Status in OpenShot Video Editor: New
>
> Bug description:
> OS: Ubuntu 9.10
> Openshot Version: 0.9.54 (from edge repo)
>
> At the beginning of every clip (ogv) all I get is white for a few seconds.
> After a while it starts to appear normally. If I clip the video at a point
> where it is already displaying properly, then the beginning of the resulting
> clip is also white.
>
> Forum post where another user confirms this behaviour.
> http://openshotusers.com/forum/viewtopic.php?f=11&t=53&p=128#p128
>
>
>
> _______________________________________________
> Mailing list: https://launchpad.net/~openshot.developers<https://launchpad.net/%7Eopenshot.developers>
> Post to : <email address hidden>
> Unsubscribe : https://launchpad.net/~openshot.developers<https://launchpad.net/%7Eopenshot.developers>
> More help : https://help.launchpad.net/ListHelp
>

[TheIcemanBln (maik-bottledfish)]

Hi!

I can confirm this bug for the 1.0 Version. I imported movieclips from the Kodak Zi8.
The files are stored as *.mov (pretending to be QuickTime vids).

This is what the video states:
size: 1280 x 720
codec: H.264 / AVC
rate: 30 frames per second

This is what the audio states:
codec: MPEG-4 AAC audio
channels: Stereo
frequ.: 48000 Hz

After importing the files, OpenShot even generates "white" thumbnails.

I belive this might be some codec/ffmpeg - issue

CU

Ice

[Jonathan Thomas (jonoomph)]

Pedro & TheIcemanBln,
In an effort to better catalog video file incompatibilities, could you please take a look at this FAQ and include the additional information in this bug report: https://answers.launchpad.net/openshot/+faq/983. Thanks!

[TheIcemanBln (maik-bottledfish)]

Hi Jonathan!

As your requested. ;)

Q: 1) Does the video play and seek correctly with "ffplay"?
A: Yes, perfect, even seeking backward and forward.

Q: 2) Does the video play and seek correctly with "melt"?
A: It plays very well, but if i start seeking, it just goes forward, not backward
and after a few seeks forward, the player freezes. (Maybe i pushed the buttons to fast.)

Q:3) Please include details on the video file (using the following command):
A: Here it comes

== snip ==

FFmpeg version SVN-r19352-4:0.5+svn20090706-2ubuntu2, Copyright (c) 2000-2009 Fabrice Bellard, et al.
  configuration: --extra-version=4:0.5+svn20090706-2ubuntu2 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --disable-stripping --disable-vhook --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --extra-cflags=-I/build/buildd/ffmpeg-0.5+svn20090706/debian/include --enable-shared --disable-static
  libavutil 49.15. 0 / 49.15. 0
  libavcodec 52.20. 0 / 52.20. 0
  libavformat 52.31. 0 / 52.31. 0
  libavdevice 52. 1. 0 / 52. 1. 0
  libavfilter 0. 4. 0 / 0. 4. 0
  libswscale 0. 7. 1 / 0. 7. 1
  libpostproc 51. 2. 0 / 51. 2. 0
  built on Oct 13 2009 22:15:16, gcc: 4.4.1

Seems stream 0 codec frame rate differs from container frame rate: 59.94 (60000/1001) -> 29.97 (30000/1001)
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '494_1429.MOV':
  Duration: 00:00:01.36, start: 0.000000, bitrate: 14954 kb/s
    Stream #0.0(eng): Video: h264, yuv420p, 1280x720, 29.97 tbr, 29.97 tbn, 59.94 tbc
    Stream #0.1(eng): Audio: aac, 48000 Hz, stereo, s16

== snip ==

Q: 4) Please attach a small sample video (less than 10 MB), which reproduces the problem.

As you requested.

CU

TheIceman

[Nukeador (nukeador)]

Having the same problem here with OGV screencasts recorded with gtk-recordmydesktop

[Ismael Fanlo (ifanlo)]

A workaround:
Previously, convert ogv to mp4 and then insert the mp4 into openshoot.

$ ffmpeg -i out.ogv out.mp4

is ok!

[Matt Perry (mattperry1976)]

If I try to import an .ogv video created by recordmydesktop it retains perfect audio, however video is completely hosed. All white/gray pixels throughout entire video. Also will crash if attempting to export as .ogv

the .ogv created by recordmydesktop plays fine in multiple video players with full seek etc

thanks

matt

[Andy Finch (fincha)]

No sample video from the original bug reporter. The sample provided by TheIcemanBln plays OK using the latest trunk version of Openshot & MLT 0.5.6.