Hot answers tagged ios
MP4 with AAC audio and h.264 video is definitely playable on the PS3, and since it's an extension of Apple's .mov files, it should work on all the iDevices too. For maximum compatibility, use the h.264 'baseline' profile, and avoid AAC-HE. Older devices (like some DVD players) may require XVID video and AC3 audio in an AVI container, but that won't apply ...
So it turns out after a lot of research that this is the desired behaviour for Apple's AVPlayer component. Basically, my Internet is so slow here where I live, the component waits until the video has fully downloaded before it starts playing. The best and recommended way around this, is to generate alternate streams for the video before trying to play it. ...
In iMovie you can change the speed of a clip by selecting it in the timeline and then clicking on the icon that looks like a speedometer: Then click on the "Speed:" popup menu and choose "Fast" or "Custom". The "Custom" setting lets you choose how much faster to make it (like 200%, or 50%).
The videos I've delivered for iOS App Previews have been as per the specification in this section, viz. H.264 video codec, Baseline profile, 30 fps, AAC-LC audio codec, sampling rate 48 kHz, stereo in MP4 or MOV. Resolution and bitrate haven't been restricted to what the docs say. Those should be tailored to the device(s) your app is for.
If you click on the "?" in the upper right, you'll get yellow markers that show help. One of them is "Learn More" where it brings up the user manual and a search field. When I type "titles" into the search field, it gives me a list of options, the first of which was "Add a title." According to that help section, a title lasts the entire length of the video ...
Simplest solution is to use -movflags +faststart in your command while transcoding video file. It will move all metadata to the beginning of the file to be played. Hope this helps.
There're many great video editing apps in the AppStore. Unfortunately, I'm not allowed to name a specific app according to the StackExchange policy (my previous answer was banned). Some of them play sound while you do video editing (trimming, applying video effects, etc.) For sure smartphones now have enough computational power to do very complex video ...
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