Incorrect durations mp4 file created by ffmpeg (avconv)
- by Ruslan Sharipov
Example usage:
avconv -i rtmp://maps.lo.ufanet.ru/live/10e227922b473e91f37474fa084107af
-vcodec copy -an -sn -map 0 -f segment -segment_format mp4 -segment_time 60 -y
%05d.mp4
avconv version 0.8.3-6:0.8.3-1+b1, Copyright (c) 2000-2012 the Libav developers
built on Jun 15 2012 13:54:35 with gcc 4.7.0
HandShake: client signature does not match!
Metadata:
height 480.00
remote_addr:
sdp_session {sdp_session,0,
{sdp_o,"-","1289703354974145","1289703354974145",inet4,
"10.1.12.99"},
"Media Presentation",
{inet4,"0.0.0.0"},
{0,0},
[{"control","*"},{"range","npt=0.0
start 30400239.52
timeshift_duration 319250.58
timeshift_size 120000.00
width 640.00
[flv @ 0x1d36a40] Estimating duration from bitrate, this may be inaccurate
Input #0, flv, from
'rtmp://maps.lo.ufanet.ru/live/10e227922b473e91f37474fa084107af':
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0.0: Video: h264 (Baseline), yuvj420p, 640x480 [PAR 1:1 DAR 4:3],
1k tbr, 1k tbn, 2k tbc
Output #0, segment, to '%05d.mp4':
Metadata:
encoder : Lavf53.21.0
Stream #0.0: Video: libx264, yuvj420p, 640x480 [PAR 1:1 DAR 4:3], q=2-31,
1k tbn, 1k tbc
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press ctrl-c to stop encoding
^Cframe= 9566 fps= 36 q=-1.0 Lsize= -0kB time=318.25 bitrate= -0.0kbits/s
video:30348kB audio:0kB global headers:0kB muxing overhead -100.000071%
Received signal 2: terminating.
Result:
serafim@yard:~/video2$ ls
00000.mp4 00001.mp4 00002.mp4 00003.mp4 00004.mp4 00005.mp4
Now try to play the files in the player, such as VLC.
And that's what we get: the first fragment (00000.mp4) played well, no
problems, but the second (00001.mp4 and beyond) starts the bug manifests itself, namely the file 00001.mp4 first 60 seconds black screen, but since 61 seconds starts playing the video.
Attachments: https://dl.dropbox.com/u/760901/rtmp_and_mp4.zip
How to get rid of the delay with black screen at the beginning of the segments? Maybe ffmpeg to pass parameters, or third-party software is able to correct the obtained segments mp4?
