Buffering issuse, Video/audio sync, movie freezing
Ever since I updated my Itune a couple months ago I have had issues with watching movies I purchased from Itunes. After about 15 minutes The sync between audio and video is off. Then after a bit more time the video freezes up and audio still streams then it looks like someone hit fast forward and the video catches back up to the audio. Can anyone tell me how to ajdust the buffer size since it seems Apple took it away?
That's makes sense of course so let me ask you this for possible alternatives.. I mean I was able to edit perfect a format that's not good for fcp but if it plays perfectly there there got to be a way to get it out right?
I took that large ProRes version, since it did play correctly in qt unlike all the others, and threw it into compressor to convert to back to H264, thought being it will convert properly going that direction versus the previous direction thus hopefully being small enough to burn to a dvd..I won't know for a few hours til it's done
Idea two... What if I open my edited fcp project..and export each sequence, opposed to the whole time line, and then bring each of those exported movies into a new project with the correct settings? Then as I line up all the sequences obviously I will have to render the whole thing but at least it will be in the correct format. Since there will be no editing to do I could just add the chapter markers back in and export to QuickTime correct? Although i think that essentially what I'm doing in the previous idea with compressor kinda sorta
This could have been avoided obviously if I knew more before starting but also if fcp doesn't work with a particular format I'm surprised it let me work with it so flawlessly... I have read that while it doesn't play well with it it will providing there are a lot of effect or processing involved...which in this project there aren't..except for the section right before the problem start...so another consideration I have is to export just the highly processed middle scene sequences out to bring them back in with the format traits of the simple clips...
I appreciate you help... I'm trying to find a way not to re edit the whole feature lol. Thank you
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Hi,
I am trying to put my H-264 video (.mov) that I compress with Compressor on the web to play in JW media player. The problem is, after 30 seconds of smoothly playing, the video starts to lag, freezes frames and ever since then the audio do not sync with the video anymore (can be as far apart as 10 second). Strangely, this only happens on the longer videos.
I am assuming it has something to do with the compression setting that makes the file is too big and thus create streaming bottlenecking? Maybe I should readjust my parameters?
this is the setting I use:
File Extension: mp4
Estimated file size: 104.3 MB
Audio Encoder
AAC, Mono, 44.100 kHz
Video Encoder
Format: QT
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Height: 270
Pixel aspect ratio: Square
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Frame rate: (100% of source)
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Pixel depth: 24
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Min. Spatial quality: 25
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Thanks,
JDThanks for the input. What do you mean by encoding it as H.264 not mp4 - which setting affects that?
Maybe I already has it?
here is what I have now:
Video compression setting
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Compressor quality: High
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Data rate: Restrict to 800 kbits/sec
Optimized for: Download
Sound
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Channels: mono
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Show advanced setting: yes
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Inspector panel
File format: Quicktime Movie
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Video on Exported Movie Freezes During Playback, Audio Continues
This is a reoccurring problem I've found in some of my exported movies. After successfully exporting a project (in full quality), I view the movie in QuickTime player, where, somewhere in the middle of the movie the visual freezes and stays frozen on the same frame for the remainder of the movie. The audio however doesn't skip a beat and continues normally. The playhead in the QuickTime player continues without interruption as well. The location (or frame) where the movie freezes is always the same every time the movie is played. If you attempt to skip over the freeze spot by clicking later in the timeline, you'll successfully move the playhead forward to where you want but the visual is still frozen on that frame and the audio is fine as well. This suggests to me iMovie rendered the movie to a certain point and then, for some reason, rendered a still frame for the remaining duration.
The movie plays normally in the playback/preview within the iMovie app. itself.
The only clue I have is it seems to have this problem after a slow or fast motion effect is used. The frozen frame is generally the last frame in the clip that has a slow motion effect. If I go into the project and move the end of the clip forward to erase the troublesome frame, export, and view, the movie is completely normal until it hits another special effected clip.
This is truly a hassle and the poor solution I've found to fixing it ruins the synching I've put a lot of work into.
Help would be greatly appreciated. Thank you so much.I have had the same problem on multiple movies. I'm going to submit your post to apple feedback & I suggest you do the same. Have you found any solution? http://www.apple.com/feedback/imovie.html
I think the problem is related to running out of memory/virtual memory, so on another post I saw rebooting & shutting down other programs before rendering suggested.
Exporting in a smaller size worked for me, but I didn't create this movie to watch in postage stamp size. I'm a new mac user - what happened to apple's promise of things "just working"? -
Video/audio sync off?
I just bought an iPod today (therefore it hasn't come yet), as well as the Pirates of the Caribbean movie. I started watching Pirates on iTunes, and the video and audio were slightly off. Will this be corrected once I put it on my yet-to-arrive iPod or can I correct it or just have to live with it? Oh, and if this question is in the wrong forum, feel free to move it. Thanks.
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I have been exporting Flash Video from Adobe Premiere
Elements 3.0. I import the .FLV into Flash 8 as embedded video. The
published .SWF works fine, audio and video start in sync and stay
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This occurs no matter how short or long the exported clip.
I did my best searching through these forums, looking for an
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embedded video, make sure the frame rates are identical (SWF and
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HTH. -
Video audio sync problems resolved
I've solved my audio syncing with video problems. Maybe it will help you find your solution.
I recently installed Leap Motion but it said I needed to update my video driver. I thought my driver was up to date so for both my computers that had different video cards I updated and the syncing issues were gone.
So as far as helping you get the right update I won't be of much help. But at least this will give everyone a direction to look in and find their own solution.
I hope this helps and good luck!Hi there
In addition to what Leslie offered (which is good advice) I've seen others report success by staging the audio to begin slightly after the slide starts. Perhaps .3 .4 or .5 seconds into each slide.
Cheers... Rick
Helpful and Handy Links
Captivate Wish Form/Bug Reporting Form
Adobe Certified Captivate Training
SorcerStone Blog
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Video audio sync prob. using 9-and hd camera
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Sorry I quoted myself and there is no undo:
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I went to GSPOT and found that the original MOV files "couldn't find codecs", but when I converted those files a while back, they had codecs.
"CONTAINER: MPEG-2 Program Stream << { 1 vid, 1 aud }, MPG2 with an audio container of MPEG-1 Layer 2."
Now for my files, they are MPEG-1 with an audio container of MPEG-1 Layer 2. Now I have also converted those files to match the MPG2 format.
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Hi All,
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...from FCS1 manual 1, p220...
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Test:
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Mine has 1 sec or more afer a few seconds of recordingI called Nokia care,
They never heard of the problem!
They did not even know there was a firmware upgrade last feb.
Furthermore on the site, still frimware from nov last year is advertised as latest!
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http://support.apple.com/kb/TS4562
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Message was edited by: AriaBhajan7227This may help:
http://discussions.apple.com/thread.jspa?threadID=2629894&tstart=0
I've also tried converting the MP3 with the sample rate of 44.1K to 48 — with no luck whatsoever.
Convert the audio to aiff 48kHz.
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I have a Flex based application which is using Flash Media Server (FMS) server (version 4.0) for live video streaming between two users (i.e. a one to one teleconferencing service). This streaming is one-to-one, as defined by business rules, so that no third person can join a teleconference. Either person can start the video stream via a browser-based Flex client and communication gets established once the second user joins. Validation for connecting the streams of the two users is implemented on the FMS server (as server side scripting defined in main.asc).
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