Am 12.03.20 um 00:07 schrieb Carl Eugen Hoyos:
Am Mi., 11. März 2020 um 23:56 Uhr schrieb Ulf Zibis <[email protected]>:compatible_brands: qt CAEPWhat happens if you remove CAEP with a binary editor?
When I replace CAEP in the original video with 4 0x00 it is still playable. Here are the first 32 bytes of the original: 00 00 00 18 66 74 79 70 71 74 20 20 20 07 09 00 71 74 20 20 43 41 45 50 00 01 7F E8 6D 6F 6F 76 ....ftypqt ...qt CAEP...èmoov Here replaced with 4 0x00: 00 00 00 18 66 74 79 70 71 74 20 20 20 07 09 00 71 74 20 20 00 00 00 00 00 01 7F E8 6D 6F 6F 76 ....ftypqt ...qt .......èmoov Here are the first 32 bytes from ffmpeg: 00 00 00 14 66 74 79 70 71 74 20 20 00 00 02 00 71 74 20 20 00 00 00 08 77 69 64 65 01 67 16 A6 ....ftypqt ....qt ....wide.g.¦ As you can see: - the magic number (the first 4 bytes) is different, why? - there is a different number of 0x00 bytes after the brands string, don't know if that matters. - from byte 12 to 15 there is the different minor version number.
You can also try -video_track_timescale, this often was the reason for incompatibilities.
I'll try that too. -Ulf _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
