I have a 720p video file in a mpegts format that I want to trim a bit
from the front and back of and convert to a mpeg format. I use a command
like:
avconv -ss 0:1:23.456 -i file.ts -map 0 -c copy -t 0:54:32.111 file.mpg
to do the triming and conversion but when I try to view the result
using vlc there is no audio output and when I check the audio tracks I
see something like 70 tracks available and when I look at the codec info
I see even more streams listed (~100+). How do I get the result I am
looking for i.e. a lossless trim?
The avconv info is:
avconv version 0.8.6-4:0.8.6-0ubuntu0.12.04.1, Copyright (c) 2000-2013
the Libav developers
built on Apr 2 2013 17:02:36 with gcc 4.6.3
avconv 0.8.6-4:0.8.6-0ubuntu0.12.04.1
libavutil 51. 22. 1 / 51. 22. 1
libavcodec 53. 35. 0 / 53. 35. 0
libavformat 53. 21. 1 / 53. 21. 1
libavdevice 53. 2. 0 / 53. 2. 0
libavfilter 2. 15. 0 / 2. 15. 0
libswscale 2. 1. 0 / 2. 1. 0
libpostproc 52. 0. 0 / 52. 0. 0
The avprobe of a typical file is:
avprobe version 0.8.6-4:0.8.6-0ubuntu0.12.04.1, Copyright (c) 2007-2013
the Libav developers
built on Apr 2 2013 17:02:36 with gcc 4.6.3
[mpegts @ 0x1b209c0] Continuity check failed for pid 0 expected 15 got 6
[mpegts @ 0x1b209c0] PES packet size mismatch
[mpegts @ 0x1b209c0] PES packet size mismatch
Input #0, mpegts, from '/mythtv/sda/recordings/1091_20131001190000.mpg':
Duration: 00:59:59.16, start: 43236.008711, bitrate: 11900 kb/s
Program 1
Stream #0.0[0x31]: Video: mpeg2video (Main), yuv420p, 1280x720 [PAR
1:1 DAR 16:9], 19392 kb/s, 59.96 fps, 59.94 tbr, 90k tbn, 119.88 tbc
Stream #0.1[0x34](eng): Audio: ac3, 48000 Hz, 5.1, s16, 384 kb/s
Stream #0.2[0x35](spa): Audio: ac3, 48000 Hz, stereo, s16, 192 kb/s
avprobe of the converted file is:
avprobe version 0.8.6-4:0.8.6-0ubuntu0.12.04.1, Copyright (c) 2007-2013
the Libav developers
built on Apr 2 2013 17:02:36 with gcc 4.6.3
Input #0, mpeg, from 'video.mpg':
Duration: 00:58:07.80, start: 1.082000, bitrate: 11618 kb/s
Stream #0.0[0x80]: Audio: ac3, 48000 Hz, 5.1, s16, 384 kb/s
Stream #0.1[0x81]: Audio: ac3, 48000 Hz, stereo, s16, 192 kb/s
Stream #0.2[0x1e0]: Video: mpeg2video (Main), yuv420p, 1280x720
[PAR 1:1 DAR 16:9], 19392 kb/s, 59.96 fps, 59.94 tbr, 90k tbn, 119.88 tbc
John
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