[FFmpeg-trac] #5328(undetermined:new): dvbsubtitles re encoding
FFmpeg
trac at avcodec.org
Fri Mar 11 13:52:44 CET 2016
#5328: dvbsubtitles re encoding
-------------------------------------+-------------------------------------
Reporter: joolzg | Type: defect
Status: new | Priority: normal
Component: | Version:
undetermined | unspecified
Keywords: dvb | Blocked By:
subtitles | Reproduced by developer: 0
Blocking: |
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
When re encoding live streams which include dvb subtitles there are gaps
in streaming data and this seems dependant on the arrival of new dvb
subtitles.
{{{
% ffmpeg -i C4_hd.ts -c:v libx264 -c:a libfaac -c:s dvbsub -y -f mpegts
a.ts
ffmpeg version N-78978-gb60dfae Copyright (c) 2000-2016 the FFmpeg
developers
built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.1)
configuration: --bindir=/home/encoder/bin --enable-gpl --enable-version3
--enable-nonfree --disable-ffserver --disable-dxva2 --disable-vaapi
--disable-vda --disable-vdpau --disable-libxcb --enable-libmp3lame
--enable-postproc --enable-libfaac --enable-libzvbi --enable-libx264
--enable-libx265 --cc='ccache cc'
libavutil 55. 19.100 / 55. 19.100
libavcodec 57. 28.100 / 57. 28.100
libavformat 57. 28.100 / 57. 28.100
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 39.102 / 6. 39.102
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
[mpegts @ 0x2218520] composition_page_id 0001, 2nd 0001, subtitle type 14
[mpegts @ 0x2218520] composition_page_id 0001, 2nd 0001, subtitle type 14
Input #0, mpegts, from 'C4_hd.ts':
Duration: 00:01:44.25, start: 75460.219489, bitrate: 4656 kb/s
Program 17664
Stream #0:0[0x12d]: Video: h264 (High) ([27][0][0][0] / 0x001B),
yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 90k tbn,
50 tbc
Stream #0:1[0x12e](eng): Audio: aac_latm (LC) ([17][0][0][0] /
0x0011), 48000 Hz, stereo, fltp
Stream #0:2[0x132](eng): Unknown: none ([17][0][0][0] / 0x0011)
(visual impaired)
Stream #0:3[0x131](eng): Subtitle: dvb_subtitle ([6][0][0][0] /
0x0006) Extra 5 (0001000114)
[libx264 @ 0x226a080] using SAR=1/1
[libx264 @ 0x226a080] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
[libx264 @ 0x226a080] profile High, level 4.0
[hls,mpegts @ 0x2220640] HLS Enabled 0
Output #0, hls,mpegts, to 'a.ts':
Metadata:
encoder : Lavf57.28.100
Stream #0:0: Video: h264 (libx264), yuv420p, 1920x1080 [SAR 1:1 DAR
16:9], q=-1--1, 25 fps, 90k tbn, 25 tbc
Metadata:
encoder : Lavc57.28.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Stream #0:1(eng): Audio: aac (libfaac), 48000 Hz, stereo, s16, 128
kb/s
Metadata:
encoder : Lavc57.28.100 libfaac
Stream #0:2(eng): Subtitle: dvb_subtitle (dvbsub)
Metadata:
encoder : Lavc57.28.100 dvbsub
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Stream #0:1 -> #0:1 (aac_latm (native) -> aac (libfaac))
Stream #0:3 -> #0:2 (dvb_subtitle (dvbsub) -> dvb_subtitle (dvbsub))
Press [q] to stop, [?] for help
[mpegts @ 0x2218520] composition_page_id 0001, 2nd 0001, subtitle type 14
frame= 56 fps=0.0 q=0.0 size= 0kB time=00:00:01.79 bitrate=
0.0kbits/s dup=42 drop=0 speed=3.29x
frame= 80 fps= 75 q=28.0 size= 0kB time=00:00:02.68 bitrate=
0.0kbits/s dup=42 drop=0 speed=2.53x
frame= 102 fps= 64 q=28.0 size= 0kB time=00:00:03.69 bitrate=
0.0kbits/s dup=42 drop=0 speed=2.31x
frame= 112 fps= 53 q=28.0 size= 0kB time=00:00:03.90 bitrate=
0.0kbits/s dup=42 drop=0 speed=1.86x
frame= 121 fps= 46 q=28.0 size= 0kB time=00:00:04.33 bitrate=
0.0kbits/s dup=42 drop=0 speed=1.65x
Region 0 - 0 906
Region 1 - 0 848
frame= 129 fps= 41 q=28.0 size= 1471kB time=00:00:06.69
bitrate=1800.1kbits/s dup=42 drop=0 speed=2.13x
frame= 139 fps= 37 q=28.0 size= 1803kB time=00:00:06.69
bitrate=2206.2kbits/s dup=42 drop=0 speed= 1.8x
frame= 153 fps= 35 q=28.0 size= 2161kB time=00:00:06.69
bitrate=2643.8kbits/s dup=42 drop=0 speed=1.55x
frame= 164 fps= 34 q=28.0 size= 2812kB time=00:00:06.69
bitrate=3441.0kbits/s dup=42 drop=0 speed=1.37x
frame= 177 fps= 33 q=28.0 size= 3201kB time=00:00:06.69
bitrate=3916.7kbits/s dup=42 drop=0 speed=1.24x
frame= 186 fps= 31 q=28.0 size= 3487kB time=00:00:06.80
bitrate=4197.1kbits/s dup=42 drop=0 speed=1.15x
frame= 196 fps= 31 q=25.0 size= 3751kB time=00:00:07.27
bitrate=4223.8kbits/s dup=42 drop=0 speed=1.13x
Region 0 - 0 906
Region 1 - 0 848
frame= 210 fps= 30 q=28.0 size= 4383kB time=00:00:10.06
bitrate=3567.4kbits/s dup=42 drop=0 speed=1.44x
frame= 221 fps= 29 q=28.0 size= 4809kB time=00:00:10.06
bitrate=3914.0kbits/s dup=42 drop=0 speed=1.34xframe= 222 fps= 23 q=-1.0
Lsize= 6616kB time=00:00:10.06 bitrate=5384.2kbits/s dup=42 drop=0
speed=1.04x
video:5950kB audio:133kB subtitle:21kB other streams:0kB global
headers:0kB muxing overhead: 8.379416%
}}}
As you can see the GAPs are where the extra debug "Region X - Y Z" appear
File is here
https://mega.nz/#!I4JByLTQ!fSEdQOkC9eBF9hu4Mvt2wrRYiQFLHzw83X7uUDjfrE0
--
Ticket URL: <https://trac.ffmpeg.org/ticket/5328>
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