[FFmpeg-user] FFMPeg reading from Logitech C920 generating H264 source produces empty output file

William C Bonner wimbonner at gmail.com
Mon Jul 22 23:47:02 CEST 2013


I tried adding the -debug_ts as the first option, and it spit lots of
information back at me that I don't really understand, so I also added a
-report option, and here's that output.

I wasn't sure where in the command line to try -use_wallclock_as_timestamps
1 so I added it right before the -y test.mp4 but didn't notice any change,
so it's not in this output.

ffmpeg started on 2013-07-22 at 14:37:06
Report written to "ffmpeg-20130722-143706.log"
Command line:
ffmpeg -report -debug_ts -f dshow -vcodec h264 -s 1280x720 -i
"video=Logitech HD Pro Webcam C920" -vcodec copy -y test.mp4
ffmpeg version N-54691-g7f4a1fd Copyright (c) 2000-2013 the FFmpeg
developers
  built on Jul 12 2013 16:31:48 with gcc 4.7.3 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
--enable-gnutls --enable-iconv --enable-libass --enable-libbluray
--enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc
--enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb
--enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus
--enable-librtmp --enable-libschroedinger --enable-libsoxr
--enable-libspeex --enable-libtheora --enable-libtwolame
--enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis
--enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid
--enable-zlib
  libavutil      52. 39.100 / 52. 39.100
  libavcodec     55. 18.102 / 55. 18.102
  libavformat    55. 12.102 / 55. 12.102
  libavdevice    55.  3.100 / 55.  3.100
  libavfilter     3. 80.101 /  3. 80.101
  libswscale      2.  3.100 /  2.  3.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  3.100 / 52.  3.100
Splitting the commandline.
Reading option '-report' ... matched as option 'report' (generate a report)
with argument '1'.
Reading option '-debug_ts' ... matched as option 'debug_ts' (print
timestamp debugging info) with argument '1'.
Reading option '-f' ... matched as option 'f' (force format) with argument
'dshow'.
Reading option '-vcodec' ... matched as option 'vcodec' (force video codec
('copy' to copy stream)) with argument 'h264'.
Reading option '-s' ... matched as option 's' (set frame size (WxH or
abbreviation)) with argument '1280x720'.
Reading option '-i' ... matched as input file with argument 'video=Logitech
HD Pro Webcam C920'.
Reading option '-vcodec' ... matched as option 'vcodec' (force video codec
('copy' to copy stream)) with argument 'copy'.
Reading option '-y' ... matched as option 'y' (overwrite output files) with
argument '1'.
Reading option 'test.mp4' ... matched as output file.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option report (generate a report) with argument 1.
Applying option debug_ts (print timestamp debugging info) with argument 1.
Applying option y (overwrite output files) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input file video=Logitech HD Pro Webcam C920.
Applying option f (force format) with argument dshow.
Applying option vcodec (force video codec ('copy' to copy stream)) with
argument h264.
Applying option s (set frame size (WxH or abbreviation)) with argument
1280x720.
Successfully parsed a group of options.
Opening an input file: video=Logitech HD Pro Webcam C920.
[dshow @ 000000000262afa0] All info found
Input #0, dshow, from 'video=Logitech HD Pro Webcam C920':
  Duration: N/A, start: 996097.192000, bitrate: N/A
    Stream #0:0, 28, 1/10000000: Video: h264 (Constrained Baseline),
yuvj420p, 1280x720 [SAR 1:1 DAR 16:9], 62.50 tbr, 10000k tbn, 60 tbc
Successfully opened the file.
Parsing a group of options: output file test.mp4.
Applying option vcodec (force video codec ('copy' to copy stream)) with
argument copy.
Successfully parsed a group of options.
Opening an output file: test.mp4.
Successfully opened the file.
Output #0, mp4, to 'test.mp4':
  Metadata:
    encoder         : Lavf55.12.102
    Stream #0:0, 0, 1/10000000: Video: h264 ([33][0][0][0] / 0x0021),
yuvj420p, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 10000k tbn, 10000k tbc
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
demuxer -> ist_index:0 type:video next_dts:NOPTS next_dts_time:NOPTS
next_pts:NOPTS next_pts_time:NOPTS pkt_pts:9960971920000
pkt_pts_time:996097 pkt_dts:9960971920000 pkt_dts_time:996097
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:0 pkt_pts_time:0 pkt_dts:0
pkt_dts_time:0 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:16666 next_dts_time:0.016666
next_pts:16666 next_pts_time:0.016666 pkt_pts:9960972240000
pkt_pts_time:996097 pkt_dts:9960972240000 pkt_dts_time:996097
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:320000 pkt_pts_time:0.032
pkt_dts:320000 pkt_dts_time:0.032 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:48666 next_dts_time:0.048666
next_pts:48666 next_pts_time:0.048666 pkt_pts:9960972560000
pkt_pts_time:996097 pkt_dts:9960972560000 pkt_dts_time:996097
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:640000 pkt_pts_time:0.064
pkt_dts:640000 pkt_dts_time:0.064 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:80666 next_dts_time:0.080666
next_pts:80666 next_pts_time:0.080666 pkt_pts:9960972880000
pkt_pts_time:996097 pkt_dts:9960972880000 pkt_dts_time:996097
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:960000 pkt_pts_time:0.096
pkt_dts:960000 pkt_dts_time:0.096 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:112666 next_dts_time:0.112666
next_pts:112666 next_pts_time:0.112666 pkt_pts:9960973200000
pkt_pts_time:996097 pkt_dts:9960973200000 pkt_dts_time:996097
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:1280000 pkt_pts_time:0.128
pkt_dts:1280000 pkt_dts_time:0.128 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:144666 next_dts_time:0.144666
next_pts:144666 next_pts_time:0.144666 pkt_pts:9960973520000
pkt_pts_time:996097 pkt_dts:9960973520000 pkt_dts_time:996097
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:1600000 pkt_pts_time:0.16
pkt_dts:1600000 pkt_dts_time:0.16 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:176666 next_dts_time:0.176666
next_pts:176666 next_pts_time:0.176666 pkt_pts:9960974000000
pkt_pts_time:996097 pkt_dts:9960974000000 pkt_dts_time:996097
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:2080000 pkt_pts_time:0.208
pkt_dts:2080000 pkt_dts_time:0.208 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:224666 next_dts_time:0.224666
next_pts:224666 next_pts_time:0.224666 pkt_pts:9960974320000
pkt_pts_time:996097 pkt_dts:9960974320000 pkt_dts_time:996097
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:2400000 pkt_pts_time:0.24
pkt_dts:2400000 pkt_dts_time:0.24 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:256666 next_dts_time:0.256666
next_pts:256666 next_pts_time:0.256666 pkt_pts:9960974640000
pkt_pts_time:996097 pkt_dts:9960974640000 pkt_dts_time:996097
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:2720000 pkt_pts_time:0.272
pkt_dts:2720000 pkt_dts_time:0.272 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:288666 next_dts_time:0.288666
next_pts:288666 next_pts_time:0.288666 pkt_pts:9960974960000
pkt_pts_time:996097 pkt_dts:9960974960000 pkt_dts_time:996097
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:3040000 pkt_pts_time:0.304
pkt_dts:3040000 pkt_dts_time:0.304 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:320666 next_dts_time:0.320666
next_pts:320666 next_pts_time:0.320666 pkt_pts:9960975280000
pkt_pts_time:996098 pkt_dts:9960975280000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:3360000 pkt_pts_time:0.336
pkt_dts:3360000 pkt_dts_time:0.336 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:352666 next_dts_time:0.352666
next_pts:352666 next_pts_time:0.352666 pkt_pts:9960975600000
pkt_pts_time:996098 pkt_dts:9960975600000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:3680000 pkt_pts_time:0.368
pkt_dts:3680000 pkt_dts_time:0.368 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:384666 next_dts_time:0.384666
next_pts:384666 next_pts_time:0.384666 pkt_pts:9960975920000
pkt_pts_time:996098 pkt_dts:9960975920000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:4000000 pkt_pts_time:0.4
pkt_dts:4000000 pkt_dts_time:0.4 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:416666 next_dts_time:0.416666
next_pts:416666 next_pts_time:0.416666 pkt_pts:9960976240000
pkt_pts_time:996098 pkt_dts:9960976240000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:4320000 pkt_pts_time:0.432
pkt_dts:4320000 pkt_dts_time:0.432 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:448666 next_dts_time:0.448666
next_pts:448666 next_pts_time:0.448666 pkt_pts:9960976560000
pkt_pts_time:996098 pkt_dts:9960976560000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:4640000 pkt_pts_time:0.464
pkt_dts:4640000 pkt_dts_time:0.464 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:480666 next_dts_time:0.480666
next_pts:480666 next_pts_time:0.480666 pkt_pts:9960976880000
pkt_pts_time:996098 pkt_dts:9960976880000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:4960000 pkt_pts_time:0.496
pkt_dts:4960000 pkt_dts_time:0.496 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:512666 next_dts_time:0.512666
next_pts:512666 next_pts_time:0.512666 pkt_pts:9960977200000
pkt_pts_time:996098 pkt_dts:9960977200000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:5280000 pkt_pts_time:0.528
pkt_dts:5280000 pkt_dts_time:0.528 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:544666 next_dts_time:0.544666
next_pts:544666 next_pts_time:0.544666 pkt_pts:9960977680000
pkt_pts_time:996098 pkt_dts:9960977680000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:5760000 pkt_pts_time:0.576
pkt_dts:5760000 pkt_dts_time:0.576 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:592666 next_dts_time:0.592666
next_pts:592666 next_pts_time:0.592666 pkt_pts:9960978000000
pkt_pts_time:996098 pkt_dts:9960978000000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:6080000 pkt_pts_time:0.608
pkt_dts:6080000 pkt_dts_time:0.608 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:624666 next_dts_time:0.624666
next_pts:624666 next_pts_time:0.624666 pkt_pts:9960978320000
pkt_pts_time:996098 pkt_dts:9960978320000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:6400000 pkt_pts_time:0.64
pkt_dts:6400000 pkt_dts_time:0.64 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:656666 next_dts_time:0.656666
next_pts:656666 next_pts_time:0.656666 pkt_pts:9960978640000
pkt_pts_time:996098 pkt_dts:9960978640000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:6720000 pkt_pts_time:0.672
pkt_dts:6720000 pkt_dts_time:0.672 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:688666 next_dts_time:0.688666
next_pts:688666 next_pts_time:0.688666 pkt_pts:9960978960000
pkt_pts_time:996098 pkt_dts:9960978960000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:7040000 pkt_pts_time:0.704
pkt_dts:7040000 pkt_dts_time:0.704 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:720666 next_dts_time:0.720666
next_pts:720666 next_pts_time:0.720666 pkt_pts:9960979280000
pkt_pts_time:996098 pkt_dts:9960979280000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:7360000 pkt_pts_time:0.736
pkt_dts:7360000 pkt_dts_time:0.736 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:752666 next_dts_time:0.752666
next_pts:752666 next_pts_time:0.752666 pkt_pts:9960979600000
pkt_pts_time:996098 pkt_dts:9960979600000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:7680000 pkt_pts_time:0.768
pkt_dts:7680000 pkt_dts_time:0.768 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:784666 next_dts_time:0.784666
next_pts:784666 next_pts_time:0.784666 pkt_pts:9960979920000
pkt_pts_time:996098 pkt_dts:9960979920000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:8000000 pkt_pts_time:0.8
pkt_dts:8000000 pkt_dts_time:0.8 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:816666 next_dts_time:0.816666
next_pts:816666 next_pts_time:0.816666 pkt_pts:9960980240000
pkt_pts_time:996098 pkt_dts:9960980240000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:8320000 pkt_pts_time:0.832
pkt_dts:8320000 pkt_dts_time:0.832 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:848666 next_dts_time:0.848666
next_pts:848666 next_pts_time:0.848666 pkt_pts:9960980560000
pkt_pts_time:996098 pkt_dts:9960980560000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:8640000 pkt_pts_time:0.864
pkt_dts:8640000 pkt_dts_time:0.864 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:880666 next_dts_time:0.880666
next_pts:880666 next_pts_time:0.880666 pkt_pts:9960980880000
pkt_pts_time:996098 pkt_dts:9960980880000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:8960000 pkt_pts_time:0.896
pkt_dts:8960000 pkt_dts_time:0.896 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:912666 next_dts_time:0.912666
next_pts:912666 next_pts_time:0.912666 pkt_pts:9960981200000
pkt_pts_time:996098 pkt_dts:9960981200000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:9280000 pkt_pts_time:0.928
pkt_dts:9280000 pkt_dts_time:0.928 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:944000 next_dts_time:0.944
next_pts:944000 next_pts_time:0.944 pkt_pts:9960981520000
pkt_pts_time:996098 pkt_dts:9960981520000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:9600000 pkt_pts_time:0.96
pkt_dts:9600000 pkt_dts_time:0.96 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:976000 next_dts_time:0.976
next_pts:976000 next_pts_time:0.976 pkt_pts:9960982000000
pkt_pts_time:996098 pkt_dts:9960982000000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:10080000
pkt_pts_time:1.008 pkt_dts:10080000 pkt_dts_time:1.008 off:-996097192000
off_time:-996097
demuxer -> ist_index:0 type:video next_dts:1024000 next_dts_time:1.024
next_pts:1024000 next_pts_time:1.024 pkt_pts:9960982320000
pkt_pts_time:996098 pkt_dts:9960982320000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:10400000 pkt_pts_time:1.04
pkt_dts:10400000 pkt_dts_time:1.04 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:1056000 next_dts_time:1.056
next_pts:1056000 next_pts_time:1.056 pkt_pts:9960982640000
pkt_pts_time:996098 pkt_dts:9960982640000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:10720000
pkt_pts_time:1.072 pkt_dts:10720000 pkt_dts_time:1.072 off:-996097192000
off_time:-996097
demuxer -> ist_index:0 type:video next_dts:1088000 next_dts_time:1.088
next_pts:1088000 next_pts_time:1.088 pkt_pts:9960982960000
pkt_pts_time:996098 pkt_dts:9960982960000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:11040000
pkt_pts_time:1.104 pkt_dts:11040000 pkt_dts_time:1.104 off:-996097192000
off_time:-996097
demuxer -> ist_index:0 type:video next_dts:1120000 next_dts_time:1.12
next_pts:1120000 next_pts_time:1.12 pkt_pts:9960983280000
pkt_pts_time:996098 pkt_dts:9960983280000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:11360000
pkt_pts_time:1.136 pkt_dts:11360000 pkt_dts_time:1.136 off:-996097192000
off_time:-996097
demuxer -> ist_index:0 type:video next_dts:1152000 next_dts_time:1.152
next_pts:1152000 next_pts_time:1.152 pkt_pts:9960983600000
pkt_pts_time:996098 pkt_dts:9960983600000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:11680000
pkt_pts_time:1.168 pkt_dts:11680000 pkt_dts_time:1.168 off:-996097192000
off_time:-996097
demuxer -> ist_index:0 type:video next_dts:1184000 next_dts_time:1.184
next_pts:1184000 next_pts_time:1.184 pkt_pts:9960983920000
pkt_pts_time:996098 pkt_dts:9960983920000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:12000000 pkt_pts_time:1.2
pkt_dts:12000000 pkt_dts_time:1.2 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:1216000 next_dts_time:1.216
next_pts:1216000 next_pts_time:1.216 pkt_pts:9960984240000
pkt_pts_time:996098 pkt_dts:9960984240000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:12320000
pkt_pts_time:1.232 pkt_dts:12320000 pkt_dts_time:1.232 off:-996097192000
off_time:-996097
demuxer -> ist_index:0 type:video next_dts:1248000 next_dts_time:1.248
next_pts:1248000 next_pts_time:1.248 pkt_pts:9960984560000
pkt_pts_time:996098 pkt_dts:9960984560000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:12640000
pkt_pts_time:1.264 pkt_dts:12640000 pkt_dts_time:1.264 off:-996097192000
off_time:-996097
demuxer -> ist_index:0 type:video next_dts:1280000 next_dts_time:1.28
next_pts:1280000 next_pts_time:1.28 pkt_pts:9960984880000
pkt_pts_time:996098 pkt_dts:9960984880000 pkt_dts_time:996098
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:12960000
pkt_pts_time:1.296 pkt_dts:12960000 pkt_dts_time:1.296 off:-996097192000
off_time:-996097
demuxer -> ist_index:0 type:video next_dts:1312000 next_dts_time:1.312
next_pts:1312000 next_pts_time:1.312 pkt_pts:9960985200000
pkt_pts_time:996099 pkt_dts:9960985200000 pkt_dts_time:996099
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:13280000
pkt_pts_time:1.328 pkt_dts:13280000 pkt_dts_time:1.328 off:-996097192000
off_time:-996097
demuxer -> ist_index:0 type:video next_dts:1344000 next_dts_time:1.344
next_pts:1344000 next_pts_time:1.344 pkt_pts:9960985520000
pkt_pts_time:996099 pkt_dts:9960985520000 pkt_dts_time:996099
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:13600000 pkt_pts_time:1.36
pkt_dts:13600000 pkt_dts_time:1.36 off:-996097192000 off_time:-996097
demuxer -> ist_index:0 type:video next_dts:1376000 next_dts_time:1.376
next_pts:1376000 next_pts_time:1.376 pkt_pts:9960986000000
pkt_pts_time:996099 pkt_dts:9960986000000 pkt_dts_time:996099
off:-996097192000 off_time:-996097
demuxer+ffmpeg -> ist_index:0 type:video pkt_pts:14080000
pkt_pts_time:1.408 pkt_dts:14080000 pkt_dts_time:1.408 off:-996097192000
off_time:-996097
frame=    0 fps=0.0 q=-1.0 size=       0kB time=00:00:00.00 bitrate=N/A
frame=    0 fps=0.0 q=-1.0 Lsize=       0kB time=00:00:00.00 bitrate=N/A

video:0kB audio:0kB subtitle:0 global headers:0kB muxing overhead inf%
Output file is empty, nothing was encoded (check -ss / -t / -frames
parameters if used)
0 frames successfully decoded, 0 decoding errors
[AVIOContext @ 0000000006257280] Statistics: 4 seeks, 4 writeouts



On Mon, Jul 22, 2013 at 1:51 AM, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:

> William C Bonner <wimbonner <at> gmail.com> writes:
>
> > frame=    0 fps=0.0 q=-1.0 Lsize=       0kB time=00:00:00.00 bitrate=N/A
> > video:0kB audio:0kB subtitle:0 global headers:0kB muxing overhead inf%
> > Output file is empty, nothing was encoded
> > (check -ss / -t / -frames parameters if used)
>
> Use -debug_ts to show the timestamps of the incoming stream,
> and please try -use_wallclock_as_timestamps 1 which may
> help.
>
> Carl Eugen
>
> _______________________________________________
> ffmpeg-user mailing list
> ffmpeg-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>


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