id summary reporter owner description type status priority component version resolution keywords cc blockedby blocking reproduced analyzed 1778 EIA-608 / EIA-708 Closed Captions disappear when transcoding/reencoding mikecheat04 "Summary of the bug: When transoding/reencoding video ffmepg loses the CC data that was embedded within the actual video stream itself. This type of CC is referred to as EIA-608/EIA-708 and is muxed to the video stream following guidelines in SCTE 128 from my research. If you use '-c:v copy' the CC remains intact. I'm capturing live video from the gige port of a Motorola DSR-6100 IRD that is putting out UDP multicast TS. This PDF give more details regarding how this method of CC works: http://www.evertz.com/resources/eia_608_708_cc.pdf Here are the files produced from the below command. They are larger than the 10MB requested so I've hosted them on my site, here are the direct links. http://mikecheat.com/disjrhd.ts - Original(18.2MB) http://mikecheat.com/disjrsd.ts - Reencoded(8.9MB) There is another open source project that seems to have figured out how to pull this CC data from video. They have the source code on their website, I've included the link. http://zapping.sourceforge.net/ZVBI/index.html How to reproduce: root@hdmux:/home/mike# ffmpeg -i 'udp://239.1.1.3:6100?fifo_size=9000000' -map 0:p:1:0 -c:v mpeg2video -s 704x480 -r ntsc -b:v 3000k -map 0:p:1:1 -c:a mp3 -ac 2 -ar 48000 -b:a 128k -f mpegts disjrsd.ts -map 0:p:1:0 -c:v copy -map 0:p:1:1 -c:a copy -f mpegts disjrhd.ts ffmpeg version 1.0 Copyright (c) 2000-2012 the FFmpeg developers built on Sep 28 2012 14:24:44 with gcc 4.4.5 (Debian 4.4.5-8) configuration: --enable-gpl --enable-nonfree --enable-shared --enable-runtime-cpudetect --enable-libmp3lame --enable-libx264 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 [mpegts @ 0x2169240] Unable to seek back to the start [h264 @ 0x2193a80] non-existing PPS referenced [h264 @ 0x2193a80] non-existing PPS 0 referenced [h264 @ 0x2193a80] decode_slice_header error [h264 @ 0x2193a80] no frame! [h264 @ 0x2193a80] non-existing PPS referenced [h264 @ 0x2193a80] non-existing PPS 0 referenced [h264 @ 0x2193a80] decode_slice_header error [h264 @ 0x2193a80] no frame! [h264 @ 0x2193a80] non-existing PPS referenced [h264 @ 0x2193a80] non-existing PPS 0 referenced [h264 @ 0x2193a80] decode_slice_header error [h264 @ 0x2193a80] no frame! [h264 @ 0x2193a80] non-existing PPS referenced [h264 @ 0x2193a80] non-existing PPS 0 referenced [h264 @ 0x2193a80] decode_slice_header error [h264 @ 0x2193a80] no frame! [h264 @ 0x2193a80] non-existing PPS referenced [h264 @ 0x2193a80] non-existing PPS 0 referenced [h264 @ 0x2193a80] decode_slice_header error [h264 @ 0x2193a80] no frame! [h264 @ 0x2193a80] non-existing PPS referenced [h264 @ 0x2193a80] non-existing PPS 0 referenced [h264 @ 0x2193a80] decode_slice_header error [h264 @ 0x2193a80] no frame! [h264 @ 0x2193a80] non-existing PPS referenced [h264 @ 0x2193a80] non-existing PPS 0 referenced [h264 @ 0x2193a80] decode_slice_header error [h264 @ 0x2193a80] no frame! [h264 @ 0x2193a80] non-existing PPS referenced [h264 @ 0x2193a80] non-existing PPS 0 referenced [h264 @ 0x2193a80] decode_slice_header error [h264 @ 0x2193a80] no frame! [h264 @ 0x2193a80] non-existing PPS referenced [h264 @ 0x2193a80] non-existing PPS 0 referenced [h264 @ 0x2193a80] decode_slice_header error [h264 @ 0x2193a80] no frame! [h264 @ 0x2193a80] non-existing PPS referenced [h264 @ 0x2193a80] non-existing PPS 0 referenced [h264 @ 0x2193a80] decode_slice_header error [h264 @ 0x2193a80] no frame! [h264 @ 0x2193a80] mmco: unref short failure Last message repeated 2 times [mpegts @ 0x2169240] max_analyze_duration 5000000 reached at 5003333 [mpegts @ 0x2169240] Estimating duration from bitrate, this may be inaccurate Input #0, mpegts, from 'udp://239.1.1.3:6100?fifo_size=9000000': Duration: N/A, start: 11940.555644, bitrate: 768 kb/s Program 1 Stream #0:0[0x1e00]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 61.76 fps, 59.94 tbr, 90k tbn, 119.88 tbc Stream #0:1[0x1020](eng): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), s16, 384 kb/s Stream #0:2[0x1021](spa): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, s16, 192 kb/s Stream #0:3[0x1022](eng): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, s16, 192 kb/s File 'disjrhd.ts' already exists. Overwrite ? [y/N] y muxrate VBR, pcr every 2 pkts, sdt every 200, pat/pmt every 40 pkts [mpegts @ 0x22aad60] muxrate VBR, pcr every 5 pkts, sdt every 200, pat/pmt every 40 pkts Output #0, mpegts, to 'disjrsd.ts': Metadata: encoder : Lavf54.29.104 Stream #0:0: Video: mpeg2video, yuv420p, 704x480 [SAR 40:33 DAR 16:9], q=2-31, 3000 kb/s, 90k tbn, 29.97 tbc Stream #0:1(eng): Audio: mp3, 48000 Hz, stereo, s16, 128 kb/s Output #1, mpegts, to 'disjrhd.ts': Metadata: encoder : Lavf54.29.104 Stream #1:0: Video: h264 ([27][0][0][0] / 0x001B), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 61.76 fps, 90k tbn, 59.94 tbc Stream #1:1(eng): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), 384 kb/s Stream mapping: Stream #0:0 -> #0:0 (h264 -> mpeg2video) Stream #0:1 -> #0:1 (ac3 -> libmp3lame) Stream #0:0 -> #1:0 (copy) Stream #0:1 -> #1:1 (copy) Press [q] to stop, [?] for help [h264 @ 0x28a5740] Missing reference picture [h264 @ 0x28a5740] decode_slice_header error [h264 @ 0x28a5740] concealing 3600 DC, 3600 AC, 3600 MV errors in B frame [h264 @ 0x28a63a0] Missing reference picture [h264 @ 0x28a63a0] decode_slice_header error [h264 @ 0x28a63a0] concealing 3600 DC, 3600 AC, 3600 MV errors in B frame [h264 @ 0x28a68e0] reference picture missing during reorder [h264 @ 0x28a68e0] Missing reference picture [h264 @ 0x28a68e0] decode_slice_header error [h264 @ 0x28a68e0] concealing 3600 DC, 3600 AC, 3600 MV errors in P frame [h264 @ 0x28a7360] mmco: unref short failure [h264 @ 0x2c4ddc0] mmco: unref short failure frame= 656 fps= 47 q=2.0 Lq=-1.0 size= 9102kB time=00:00:21.93 bitrate=3398.6kbits/s dup=22 drop=628 video:24157kB audio:1326kB subtitle:0 global headers:0kB muxing overhead -64.284273% Received signal 2: terminating. You can't use my command exactly as is because I'm capturing from a live source. You can use one of the above files to emulate the problem. If any other info is needed please let me know. Thank you" enhancement open wish undetermined git-master cc 0 0