[FFmpeg-user] Problem remuxing corrupted HLS-stream

[Vadim Lazovskiy]

Using 'concat' demuxer as workaround for this problem:

conv01:~ # grep '.ts' stream.m3u8 | sed -r 's/.*/file \0/g' | ffmpeg -f
concat -i - -codec:v copy -y /tmp/out.flv
ffmpeg version 2.1.1 Copyright (c) 2000-2013 the FFmpeg developers
  built on Nov  8 2013 10:57:47 with gcc 4.8 (SUSE Linux)
  configuration: --shlibdir=/usr/lib64 --prefix=/usr
--mandir=/usr/share/man --libdir=/usr/lib64 --enable-shared
--disable-static --enable-debug --disable-stripping --extra-cflags='-O2 -g
-m64 -fmessage-length=0 -D_FORTIFY_SOURCE=2 -fstack-protector
-funwind-tables -fasynchronous-unwind-tables -fPIC -I/usr/include/gsm'
--enable-gpl --enable-x11grab --enable-version3 --enable-pthreads
--enable-libfaac --enable-libfdk_aac --enable-nonfree --enable-avfilter
--enable-libpulse --enable-libvpx --enable-libopus --enable-libass
--enable-libmp3lame --enable-libvorbis --enable-libtheora --enable-libspeex
--enable-libxvid --enable-libx264 --enable-libschroedinger --enable-libgsm
--enable-libopencore-amrnb --enable-libopencore-amrwb --enable-postproc
--enable-libdc1394 --enable-librtmp --enable-libfreetype
--enable-avresample --enable-libtwolame --enable-libvo-aacenc
--enable-gnutls
  libavutil      52. 48.101 / 52. 48.101
  libavcodec     55. 39.101 / 55. 39.101
  libavformat    55. 19.104 / 55. 19.104
  libavdevice    55.  5.100 / 55.  5.100
  libavfilter     3. 90.100 /  3. 90.100
  libavresample   1.  1.  0 /  1.  1.  0
  libswscale      2.  5.101 /  2.  5.101
  libswresample   0. 17.104 /  0. 17.104
  libpostproc    52.  3.100 / 52.  3.100
Input #0, concat, from 'pipe:':
  Duration: N/A, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(tv,
bt709), 1280x720, 25 fps, 25 tbr, 90k tbn, 50 tbc
Output #0, flv, to '/tmp/out.flv':
  Metadata:
    encoder         : Lavf55.19.104
    Stream #0:0: Video: h264 ([7][0][0][0] / 0x0007), yuv420p, 1280x720,
q=2-31, 25 fps, 1k tbn, 90k tbc
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
[mpegts @ 0x1bc5880] DTS discontinuity in stream 0: packet 6 with DTS 6,
packet 7 with DTS 3600
frame= 2577 fps=0.0 q=-1.0 Lsize=   25320kB time=00:01:42.40
bitrate=2025.5kbits/s
video:25269kB audio:0kB subtitle:0 global headers:0kB muxing overhead
0.200305%

As for the standard hls input format, seems it doesn't support PTS
adjusting. Perhaps it is not supposed to.



2014-01-27 Vadim Lazovskiy <vadim.lazovskiy at gmail.com>

> Thank you for reply!
>
> Here is the command and the output. This is the one I needed and expected
> to work.
> Please, note the resulting duration.
> http://pastebin.com/mCfcLf3W
>
> The same command with increased verbosity:
> http://pastebin.com/Hy0qdnGX
>
> This log entries seems to be meaningful:
>
>
>    1. [mpegts @ 0x75fd80] Continuity check failed for pid 17 expected 5
>    got 0
>    2. [mpegts @ 0x75fd80] Continuity check failed for pid 0 expected 7
>    got 0
>    3. [mpegts @ 0x75fd80] Continuity check failed for pid 4096 expected 7
>    got 0
>    4. [mpegts @ 0x75fd80] Continuity check failed for pid 256 expected 13
>    got 0
>
>
> Buy using this command I've managed to fix the issue with output file
> duration:
> http://pastebin.com/axAhmcPg
>
> But in this case full transcoding was performed.
>
> I'd like to know if there is non-CPU-related solution to compose single
> video file from such HLS stream.
>
>
> 2014-01-26 Carl Eugen Hoyos <cehoyos at ag.or.at>
>
> Vadim Lazovskiy <vadim.lazovskiy <at> gmail.com> writes:
>>
>> > Here is the ffmpeg output cut:
>>
>> If you ask for support on this mailing list, please
>> always provide your command line together with the
>> complete, uncut console output, do not cut the
>> start of the output.
>>
>> Carl Eugen
>>
>> _______________________________________________
>> ffmpeg-user mailing list
>> ffmpeg-user at ffmpeg.org
>> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>>
>
>
>
> --
> Best Regards,
> Vadim Lazovskiy
>



-- 
Best Regards,
Vadim Lazovskiy