How to with QuickTime Pro:
Aim:
We will work with an existing movie that has been shot and edited. From iMovie we can make a ready-to-go 3gpp file.
What will you need:
Hardware: G3 - G4 - G5 Mac.
Software: QuickTime Pro. You will need to buy a copy, if you don't have a licence - click here for more info.
1. First of all open up a file in QuickTime Pro. Applications > QuickTime Player
- Tip: a short cut to Applications folder when in the finder is to press "Shift + Apple key + A"
2. Now well will export (or in technical terms transcode) the file by going to File > Export
- Tip: a short cut to is to press "Apple key + E"
[ Click here to see movie of how to do the above ]
3. You will then see a new window pop up, if you Export: > Movie to 3G > then click "Options..."
[ Click here to see movie of how to do the above ]
4. Now we can fine-tune our movie to play over the internet for GPRS and 3G phones. Under the Video tab the settings are as follows:
Note: For Audio users ignore this part, as if you have opened up your audio file in QuickTime Pro this section will be greyed out.
- Video: optional mpeg-4 or H.263
- Date rate: 20 to about 25 kbits / second if you want your movie to work on GPRS and 3G phones.
- Frames per second: 8-15 my preferred rate is 8 FPS
- Key frame every: your discretion
- Re-synch markers: tick - Adds re-sync markers inside the video frames to help with loss recovery when streaming.
- Size: 176 x 144
[ Click here to see movie of how to do the above ]
5. Under the Audio tab, the settings are as follows:
- Audio: AMR-NB (Speech)
- Data Rate: 4.72 kbps note: if your creating audio only files then 12.2 kbps
- Channels: Mono
- Frames per sample: 5
- Silence detection: tick - Available only with AMR audio, this option detects audio portions with low signal levels and adjusts the data rate of the output accordingly.
[ Click here to see movie of how to do the above ]
6. The last tab we will look at is the Streaming tab, where we will hint our movie for streaming:
- Enable streaming: tick
- Maximum packet size: 380 up to 480 bytes
- Maximum packet duration: 100 msec
- Optimise for server: tick - helps the server to process the file faster, but increases the file size.
[ Click here to see movie of how to do the above ]
7. Now you can click "OK" then name your new file and save it, ready to be put up on your streaming server or on to your phone.
