[FFmpeg-trac] #8677(avcodec:new): HEVC libx265 removes Closed caption
FFmpeg
trac at avcodec.org
Sun May 17 20:15:38 EEST 2020
#8677: HEVC libx265 removes Closed caption
-------------------------------------+-------------------------------------
Reporter: | Type: defect
dhanishvijayan |
Status: new | Priority: critical
Component: avcodec | Version: 4.2
Keywords: HEVC | Blocked By:
libx265 |
Blocking: | Reproduced by developer: 1
Analyzed by developer: 1 |
-------------------------------------+-------------------------------------
Summary of the bug:
'''I am using the FFmpeg static binary to trancode ts file to HLS.'''
The ffprobe output of the input file as shown.
{{{
abish at abish-TUF-Gaming-FX505DT-FX505DT:~/Documents/InavadaTest$
./ffmpeg-4.2.2-amd64-static/ffprobe AMC.ts
ffprobe version 4.2.2-static https://johnvansickle.com/ffmpeg/ Copyright
(c) 2007-2019 the FFmpeg developers
built with gcc 8 (Debian 8.3.0-6)
configuration: --enable-gpl --enable-version3 --enable-static --disable-
debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio
--cc=gcc --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp
--enable-libgme --enable-gray --enable-libaom --enable-libfribidi
--enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame
--enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
--enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt
--enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab
--enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264
--enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid
--enable-libzvbi --enable-libzimg
libavutil 56. 31.100 / 56. 31.100
libavcodec 58. 54.100 / 58. 54.100
libavformat 58. 29.100 / 58. 29.100
libavdevice 58. 8.100 / 58. 8.100
libavfilter 7. 57.100 / 7. 57.100
libswscale 5. 5.100 / 5. 5.100
libswresample 3. 5.100 / 3. 5.100
libpostproc 55. 5.100 / 55. 5.100
[mpeg2video @ 0x65b3b80] Invalid frame dimensions 0x0.
Last message repeated 20 times
[mpegts @ 0x65aea40] start time for stream 5 is not set in
estimate_timings_from_pts
[mpegts @ 0x65aea40] PES packet size mismatch
Last message repeated 1 times
[mpegts @ 0x65aea40] Could not find codec parameters for stream 1
(Unknown: none (ETV1 / 0x31565445)): unknown codec
Consider increasing the value for the 'analyzeduration' and 'probesize'
options
[mpegts @ 0x65aea40] Could not find codec parameters for stream 2
(Unknown: none (ETV1 / 0x31565445)): unknown codec
Consider increasing the value for the 'analyzeduration' and 'probesize'
options
[mpegts @ 0x65aea40] Could not find codec parameters for stream 6
(Unknown: none ([192][0][0][0] / 0x00C0)): unknown codec
Consider increasing the value for the 'analyzeduration' and 'probesize'
options
Input #0, mpegts, from 'AMC.ts':
Duration: 00:09:59.51, start: 63682.431556, bitrate: 3122 kb/s
Program 2008
Stream #0:0[0xdec]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002),
yuv420p(tv, top first), 704x480 [SAR 10:11 DAR 4:3], Closed Captions,
29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
Stream #0:1[0xded]: Unknown: none (ETV1 / 0x31565445)
Stream #0:2[0xdee]: Unknown: none (ETV1 / 0x31565445)
Stream #0:3[0xdef](eng): Audio: ac3 ([129][0][0][0] / 0x0081), 48000
Hz, stereo, fltp, 192 kb/s
Stream #0:4[0xdf0](spa): Audio: ac3 ([129][0][0][0] / 0x0081), 48000
Hz, mono, fltp, 96 kb/s
Stream #0:5[0xdf1]: Data: scte_35
Stream #0:6[0xe21]: Unknown: none ([192][0][0][0] / 0x00C0)
Unsupported codec with id 0 for input stream 1
Unsupported codec with id 0 for input stream 2
Unsupported codec with id 98305 for input stream 5
Unsupported codec with id 0 for input stream 6
}}}
How to reproduce:
{{{
% ./ffmpeg-4.2.2-amd64-static/ffmpeg -y -i AMC.ts -preset slow -g 48
-sc_threshold 0 -map 0:0 -map 0:3 -map 0:0 -map 0:4 -s:v:0 640x360
-c:v:0 libx265 -b:v:0 2000k -s:v:1 960x540 -c:v:1 libx265 -b:v:1 365k
-c:a aac -b:a 128k -ac 2 -var_stream_map "v:0,a:0 v:1,a:1"
-master_pl_name stream.m3u8 -f hls -hls_time 6 -hls_list_size 0
-hls_segment_filename "stream/v%v/fileSequence%d.ts"
stream/v%v/prog_index.m3u8
ffmpeg version Version 4.2.2-static
built with gcc 8 (Debian 8.3.0-6)
}}}
ffprobe on the output filesgment of HLS shows that the CC is removed.
{{{
abish at abish-TUF-Gaming-FX505DT-FX505DT:~/Documents/InavadaTest$
./ffmpeg-4.2.2-amd64-static/ffprobe stream/v0/fileSequence0.ts
ffprobe version 4.2.2-static https://johnvansickle.com/ffmpeg/ Copyright
(c) 2007-2019 the FFmpeg developers
built with gcc 8 (Debian 8.3.0-6)
configuration: --enable-gpl --enable-version3 --enable-static --disable-
debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio
--cc=gcc --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp
--enable-libgme --enable-gray --enable-libaom --enable-libfribidi
--enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame
--enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
--enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt
--enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab
--enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264
--enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid
--enable-libzvbi --enable-libzimg
libavutil 56. 31.100 / 56. 31.100
libavcodec 58. 54.100 / 58. 54.100
libavformat 58. 29.100 / 58. 29.100
libavdevice 58. 8.100 / 58. 8.100
libavfilter 7. 57.100 / 7. 57.100
libswscale 5. 5.100 / 5. 5.100
libswresample 3. 5.100 / 3. 5.100
libpostproc 55. 5.100 / 55. 5.100
Input #0, mpegts, from 'stream/v0/fileSequence0.ts':
Duration: 00:00:08.23, start: 1.445422, bitrate: 2061 kb/s
Program 1
Metadata:
service_name : Service01
service_provider: FFmpeg
Stream #0:0[0x100]: Video: hevc (Main) (HEVC / 0x43564548),
yuv420p(tv), 640x360 [SAR 3:4 DAR 4:3], 29.97 fps, 29.97 tbr, 90k tbn,
29.97 tbc
Stream #0:1[0x101](eng): Audio: aac (LC) ([15][0][0][0] / 0x000F),
48000 Hz, stereo, fltp, 121 kb/s
}}}
'''I have a similar transcoding command with the libx264 instead of
libx265, and libx264 preserves Closed caption!'''
--
Ticket URL: <https://trac.ffmpeg.org/ticket/8677>
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