[FFmpeg-user] MPEG-TS file to x264 TS (dropped packets?)

[Ibrahim Tachijian]

We usually have no issues with transcoding mpeg2 video to x264. Audio in
this case is mp2 -> aac.

However this particular file doesnt want to transcode and its just giving
me a bunch of dropped packets. I have no issues with using the *exact* same
command line to produce what I want, its just this particular channel
(source is from sat) that doesnt want to transcode.


The issue with how to reproduce:

1. Download the input file (mpeg2 video with mp2 audio)
2. Run the following command to transcode to x264+aac

ffmpeg -analyzeduration 1000000 -i test.ts -c:v libx264 -preset superfast
-g 25 -crf 15 -maxrate 9000k -bufsize 1500k -filter:v yadif -c:a libfdk_aac
-b:a 96k -f mpegts test-x264.ts

3. All frames are dropped for some reason.

Files:

Input file can be downloaded from here (its a recording of a satellite
channel called MBC MAGHREB AL ARABIA)

https://mega.co.nz/#!PRcHCaJB!IfRFawaT8Kmlc4u_Rxk4cHyNJgFjxvWCq23VYDIofGU




COMPLETE UNCUT:

root at transcoder0:~# ffmpeg -analyzeduration 1000000 -i test.ts -c:v libx264
-preset superfast -g 25 -crf 15 -maxrate 9000k -bufsize 1500k -filter:v
yadif -c:a libfdk_aac -b:a 96k -f mpegts test-x264.ts
ffmpeg version 1.0.7 Copyright (c) 2000-2013 the FFmpeg developers
  built on Jul 19 2013 07:14:44 with gcc 4.7 (Debian 4.7.2-5)
  configuration: --prefix=/usr --extra-cflags='-g -O2 -fstack-protector
--param=ssp-buffer-size=4 -Wformat -Werror=format-security '
--extra-ldflags='-Wl,-z,relro' --cc='ccache cc' --enable-shared
--enable-libmp3lame --enable-gpl --enable-nonfree --enable-libvorbis
--enable-pthreads --enable-libfaac --enable-libxvid --enable-postproc
--enable-x11grab --enable-libgsm --enable-libtheora
--enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264
--enable-libspeex --enable-nonfree --disable-stripping --enable-libvpx
--enable-libschroedinger --disable-encoder=libschroedinger
--enable-version3 --enable-libopenjpeg --enable-librtmp --enable-avfilter
--enable-libfreetype --enable-libvo-aacenc --disable-decoder=amrnb
--enable-libvo-amrwbenc --enable-libaacplus
--libdir=/usr/lib/x86_64-linux-gnu --disable-vda --enable-libbluray
--enable-libcdio --enable-gnutls --enable-frei0r --enable-openssl
--enable-libass --enable-libopus --enable-fontconfig --enable-libfdk-aac
--enable-libdc1394 --disable-altivec --dis  libavutil      51. 73.101 / 51.
73.101
  libavcodec     54. 59.100 / 54. 59.100
  libavformat    54. 29.104 / 54. 29.104
  libavdevice    54.  2.101 / 54.  2.101
  libavfilter     3. 17.100 /  3. 17.100
  libswscale      2.  1.101 /  2.  1.101
  libswresample   0. 15.100 /  0. 15.100
  libpostproc    52.  0.100 / 52.  0.100
[mpeg2video @ 0x1f5a4a0] 0x0 is invalid
    Last message repeated 3 times
[mp2 @ 0x1f5fbc0] Header missing
[mpeg2video @ 0x1f5a4a0] 0x0 is invalid
    Last message repeated 6 times
[mpegts @ 0x1f4fd80] max_analyze_duration 1000000 reached at 1008000
[mpegts @ 0x1f4fd80] PES packet size mismatch
    Last message repeated 1 times
Input #0, mpegts, from 'test.ts':
  Duration: 19:00:07.54, start: 4978.976522, bitrate: 3 kb/s
  Program 9515
    Metadata:
      service_name    : MBC MAGHREB AL ARABIA
      service_provider: Du
    Stream #0:0[0x204]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002),
yuv420p, 720x576 [SAR 16:15 DAR 4:3], 15000 kb/s, 45.42 fps, 25 tbr, 90k
tbn, 50 tbc
    Stream #0:1[0x2aa]: Audio: mp2 ([4][0][0][0] / 0x0004), 48000 Hz,
stereo, s16, 128 kb/s
  No Program
    Stream #0:2[0x1023]: Audio: mp2, 48000 Hz, stereo, s16, 128 kb/s
[libx264 @ 0x1fce320] using SAR=16/15
[libx264 @ 0x1fce320] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 0x1fce320] profile High, level 3.0
[mpegts @ 0x1f5e780] muxrate VBR, pcr every 2 pkts, sdt every 200, pat/pmt
every 40 pkts
Output #0, mpegts, to 'test-x264.ts':
  Metadata:
    encoder         : Lavf54.29.104
    Stream #0:0: Video: h264, yuv420p, 720x576 [SAR 16:15 DAR 4:3],
q=-1--1, 90k tbn, 25 tbc
    Stream #0:1: Audio: aac, 48000 Hz, stereo, s16, 96 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (mpeg2video -> libx264)
  Stream #0:1 -> #0:1 (mp2 -> libfdk_aac)
Press [q] to stop, [?] for help
PES packet size mismatch0 size=       0kB time=00:00:00.00 bitrate=
0.0kbits/s dup=0 drop=1421
[mpeg2video @ 0x1f5a4a0] ac-tex damaged at 8 29
[mpeg2video @ 0x1f5a4a0] Warning MVs not available
[mpeg2video @ 0x1f5a4a0] concealing 315 DC, 315 AC, 315 MV errors in P frame
[mp2 @ 0x1f5ae00] incomplete frame
Error while decoding stream #0:1: Invalid data found when processing input
frame=    0 fps=0.0 q=0.0 Lsize=     820kB time=00:00:00.00 bitrate=
0.0kbits/s dup=0 drop=1544
video:0kB audio:731kB subtitle:0 global headers:0kB muxing overhead
12.227332%
root at transcoder0:~#

-- 
Ibrahim Tachijian