Crash with very large number of samples

[fcartegnie]

Use sample from there https://trac.ffmpeg.org/ticket/8895

Firefox unresponsive script kill Chrome straight error 64000

[cconcolato]

Thanks for the report. The file in invalid in multiple aspects:

• use of negative ctts value while the version of the box is set to 0
• the mdat has an invalid size. MP4Box command line reports:

[iso file] Incomplete box mdat - start 516469 size 1135222516 [iso file] Incomplete file while reading for dump - aborting parsing

The file also creates a problem for MP4Box.js because it contains 171,682,560 audio samples. The current logic in MP4Box.js is to create a Sample structure for all the Samples, right from the start. This is obviously not perfect. Changing that is on the roadmap but needs time.