[FFmpeg-user] Cut stream to file, transcode, merge trancoded file without gaps

[frafart at free.fr]

An update about my test.

Using this command :
ffmpeg -i udp://x.x.x.x:xxxx -force_key_frames 1 -c:a copy -c:v copy -map 0 -f segment -segment_time 300.000 -segment_time_delta 0.005 /tmp/segment/file%03d.ts

I can generate TS file witch begin with a I-Frame.
I check this with mpegcat :

$ mpegcat -F file000.ts | head -30
     53133: 0xB8:   GOP Start (00:00:00.00 open)
     53141: 0x00:   Picture (I-Frame) Start (3)
    164706: 0x00:   Picture (B-Frame) Start (0)
    169602: 0x00:   Picture (B-Frame) Start (1)
    175046: 0x00:   Picture (B-Frame) Start (2)
    178443: 0x00:   Picture (P-Frame) Start (7)
    193470: 0x00:   Picture (B-Frame) Start (4)
    197614: 0x00:   Picture (B-Frame) Start (5)
    202306: 0x00:   Picture (B-Frame) Start (6)
    206643: 0x00:   Picture (P-Frame) Start (11)
    222046: 0x00:   Picture (B-Frame) Start (8)
    226942: 0x00:   Picture (B-Frame) Start (9)
    233514: 0x00:   Picture (B-Frame) Start (10)
    239355: 0x00:   Picture (P-Frame) Start (15)
    256262: 0x00:   Picture (B-Frame) Start (12)
    262474: 0x00:   Picture (B-Frame) Start (13)
    269986: 0x00:   Picture (B-Frame) Start (14)
    276015: 0x00:   Picture (P-Frame) Start (19)
    300254: 0x00:   Picture (B-Frame) Start (16)
    307406: 0x00:   Picture (B-Frame) Start (17)
    315106: 0x00:   Picture (B-Frame) Start (18)
    323391: 0x00:   Picture (P-Frame) Start (23)
    351202: 0x00:   Picture (B-Frame) Start (20)
    361362: 0x00:   Picture (B-Frame) Start (21)
    369250: 0x00:   Picture (B-Frame) Start (22)
    379877: 0xB8:   GOP Start (00:00:00.00 open)
    379885: 0x00:   Picture (I-Frame) Start (3)
    476410: 0x00:   Picture (B-Frame) Start (0)
    485442: 0x00:   Picture (B-Frame) Start (1)
    492954: 0x00:   Picture (B-Frame) Start (2)
...
$ 

I thought that with the TS file, I could generate mp4 clean to join them later. But No :(