Closed Lyfei closed 1 year ago
When I open this mp4 file, only the filename and file type are displayed. But most MP4 videos can be played directly.
mp4info:
File: major brand: mp42 minor version: 0 compatible brand: mp42 compatible brand: mp41 fast start: yes Movie: duration: 18842880 (media timescale units) duration: 209365 (ms) time scale: 90000 fragments: no Found 2 Tracks Track 1: flags: 1 ENABLED id: 1 type: Video duration: 209320 ms language: eng media: sample count: 5233 timescale: 25000 duration: 5233000 (media timescale units) duration: 209320 (ms) bitrate (computed): 9592.363 Kbps display width: 1920.000000 display height: 1080.000000 frame rate (computed): 25.000 Sample Description 0 Coding: avc1 (H.264) Codec String: avc1.640029 AVC Profile: 100 (High) AVC Profile Compat: 0 AVC Level: 41 AVC NALU Length Size: 4 AVC SPS: [67640029ac2ca501e0111f7350101014000003000400000300ca10] AVC PPS: [68e881135250] Width: 1920 Height: 1080 Depth: 24 Track 2: flags: 1 ENABLED id: 2 type: Audio duration: 209320 ms language: eng media: sample count: 9814 timescale: 48000 duration: 10049536 (media timescale units) duration: 209365 (ms) bitrate (computed): 317.376 Kbps Sample Description 0 Coding: mp4a (MPEG-4 Audio) Codec String: mp4a.40.2 Stream Type: Audio Object Type: MPEG-4 Audio Max Bitrate: 407250 Avg Bitrate: 317375 Buffer Size: 1536 MPEG-4 Audio Object Type: 2 (AAC Low Complexity) MPEG-4 Audio Decoder Config: Sampling Frequency: 48000 Channels: 2 Sample Rate: 48000 Sample Size: 16 Channels: 2
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When I open this mp4 file, only the filename and file type are displayed. But most MP4 videos can be played directly.
mp4info: