[FFmpeg-user] Best sound codec for editing

[Thomas Seilund]

If I disable sound everything is better!

I use ffplay to navigate a video to find a video section to cut out. When I  
use ffplay hotkeys ie. Pageup to go forward 10 minutes the playback turns  
into slow motion for a 10 - 20 seconds before the correct playback speed is  
reestablished.

If I add the no audio, -an, option when calling ffplay I do not have slow  
motion.

When I cut out a video section with the -ss option the resulting video has  
the same problem where the first 10 – 20 seconds are slow motion. Like  
wise, if I disable audio I do not have the slow motion.

How do I avoid the slow motion and still have sound?

Below is the command to cut out a video section

ffmpeg -y -ss 1153 -i p20131119190433.ts -c:v copy -c:a copy  
p20131119190433.2.ts
ffmpeg version N-58729-g704cc5e Copyright (c) 2000-2013 the FFmpeg  
developers
   built on Dec  3 2013 21:56:15 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
   configuration: --enable-gpl --enable-libmp3lame --enable-libvpx --enable- 
libx264 --enable-version3 --enable-libvorbis --enable-libiec61883 --enable- 
libfreetype
   libavutil      52. 56.100 / 52. 56.100
   libavcodec     55. 45.100 / 55. 45.100
   libavformat    55. 22.100 / 55. 22.100
   libavdevice    55.  5.102 / 55.  5.102
   libavfilter     3. 91.100 /  3. 91.100
   libswscale      2.  5.101 /  2.  5.101
   libswresample   0. 17.104 /  0. 17.104
   libpostproc    52.  3.100 / 52.  3.100
Input #0, mpegts, from 'p20131119190433.ts':
   Duration: 00:40:22.90, start: 1.376978, bitrate: 3646 kb/s
   Program 1
     Metadata:
       service_name    : Service01
       service_provider: FFmpeg
     Stream #0:0[0x100]: Video: h264 (Constrained Baseline) ([27][0][0][0] /  
0x001B), yuv420p, 720x576 [SAR 16:15 DAR 4:3], 25 fps, 25 tbr, 90k tbn, 50  
tbc
     Stream #0:1[0x101]: Audio: mp3 ([3][0][0][0] / 0x0003), 48000 Hz,  
stereo, s16p, 128 kb/s
Output #0, mpegts, to 'p20131119190433.2.ts':
   Metadata:
     encoder         : Lavf55.22.100
     Stream #0:0: Video: h264 ([27][0][0][0] / 0x001B), yuv420p, 720x576  
[SAR 16:15 DAR 4:3], q=2-31, 25 fps, 90k tbn, 25 tbc
     Stream #0:1: Audio: mp3 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, 128  
kb/s
Stream mapping:
   Stream #0:0 -> #0:0 (copy)
   Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame=31570 fps=18597 q=-1.0 Lsize=  549961kB time=00:21:09.96  
bitrate=3547.6kbits/s
video:486436kB audio:19846kB subtitle:0 global headers:0kB muxing overhead  
8.627473%
tps at T420:~/pokalsemifinale$

Thanks

Thomas S

-- 
Venlig hilsen
Thomas Seilund
Løkketoften 46
2625 Vallensbæk