Use Quicktime to Encode Files for Seamless Looping
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For a video file to loop seamlessly, it must be encoded using specific parameters. You can also use QuickTime Pro 7 to encode a file for seamless looping. To do this, you will need to export a movie using the "Movie to QuickTime Movie" feature.
In Quicktime Pro, go to File > Export ... > Export "Movie to QuickTime Movie" > Options
Navigate to Movie Settings > Video and click Settings.
Set everything as shown in the below screenshot and play it back on your player before making any changes.
Note: Changing the Encoding from "Faster encode" to "Best Quality" will increase the file's profile and sometimes set it to a 5.0 H.264 profile. If you do decide to change this value, make sure to check that the profile of the encoded file is no higher then 4.2 (if you're using an XD or 4K player).
Select OK to return to Movie Settings.
Under Sound, select Settings.
Ensure that the Audio Format is indeed set to Linear PCM with Little Endian enabled.
Click OK.
The generated file should have approximately these specifications:
Complete name  | F:\SalsaTriimmed15MbpsFasterEncode.mov |
|---|---|
Format     | MPEG-4 |
Format profile | QuickTime |
Codec ID | qt |
File size | 17.9 MiB |
Duration | 9s 280ms |
Overall bit rate | 16.1 Mbps |
Encoded date | UTC 2014-06-20 18:01:27 |
Tagged date | UTC 2014-06-20 18:01:37 |
Writing library | Apple QuickTime |
Video
ID | 2 |
|---|---|
Format | AVC |
Format/Info | Advanced Video Codec |
Format profile | Main@L3.2 |
Format settings, CABAC | No |
Format settings, ReFrames | 2 frames |
Format settings, GOPÂ | M=2, N=25 |
Codec ID | avc1 |
Codec ID/Info | Advanced Video Coding |
Duration | 9s 280ms |
Duration_FirstFrame | -28ms |
Duration_LastFrame | -12ms |
Bit rate | 14.5 Mbps |
Width | 1 280 pixels |
Height | 720 pixels |
Display aspect ratio | 16:9 |
Frame rate mode | Constant |
Frame rate  | 25.000 fps |
Color space | YUV |
Chroma subsampling | 4:2:0 |
Bit depth  | 8 bits |
Scan type | Progressive |
Bits/(Pixel*Frame) | 0.631 |
Stream size | 16.2 MiB (90%) |
Language | English |
Encoded date | UTC 2014-06-20 18:01:28 |
Tagged date | UTC 2014-06-20 18:01:37 |
Color primaries | BT.709 |
Transfer characteristics | BT.709 |
Matrix coefficients | BT.709 |
Audio
ID | 1 |
|---|---|
Format | PCM |
Format settings, Endianness | Little |
Format settings, Sign | Signed |
Codec IDÂ | sowt |
Duration | 9s 280ms |
Bit rate mode | Constant |
Bit rate | 1 536 Kbps |
Channel(s)Â | 2 channels |
Channel positions  | Front: L R |
Sampling rate | 48.0 KHz |
Bit depth | 16 bits |
Stream size | 1.70 MiB (10%) |
Language | English |
Encoded date | UTC 2014-06-20 18:01:28 |
Tagged date | UTC 2014-06-20 18:01:37 |
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You should check that the generated file is still within the required specs using MediaInfo.