October 2020 - FFmpeg-trac - lists.ffmpeg.org

#4641(ffmpeg:new): Error decoding SILK frame
by FFmpeg 03 Oct '20

03 Oct '20

#4641: Error decoding SILK frame -------------------------------------+------------------------------------- Reporter: zevarito | Type: defect Status: new | Priority: normal Component: ffmpeg | Version: Keywords: opus vp8 | unspecified webrtc | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+------------------------------------- When I reproduce the attached MKV file with VP8/Opus it lost audio. FFplay logs the following errors several times: {{{ [opus @ 0x7f952101f400] LBRR frames present; this is unsupported [opus @ 0x7f952101f400] Error decoding a SILK frame. [opus @ 0x7f952101f400] Error decoding an Opus frame. }}} The file was generated live recording a Webrtc session. Any help welcome, thanks. -- Ticket URL: <https://trac.ffmpeg.org/ticket/4641> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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Re: [FFmpeg-trac] #2602(avformat:open): Implement a soft-telecine filter
by FFmpeg 03 Oct '20

03 Oct '20

#2602: Implement a soft-telecine filter -------------------------------------+------------------------------------- Reporter: microchip | Owner: Type: enhancement | Status: open Priority: wish | Component: avformat Version: git-master | Resolution: Keywords: mpegps | Blocked By: pulldown mpeg2video | Blocking: | Reproduced by developer: 1 Analyzed by developer: 0 | -------------------------------------+------------------------------------- Comment (by cehoyos): Who wrote this patch and under what license was the original code released? I would have expected that the option is not boolean but a target frame rate. -- Ticket URL: <https://trac.ffmpeg.org/ticket/2602#comment:12> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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Re: [FFmpeg-trac] #2602(avformat:open): Implement a soft-telecine filter
by FFmpeg 03 Oct '20

03 Oct '20

#2602: Implement a soft-telecine filter -------------------------------------+------------------------------------- Reporter: microchip | Owner: Type: enhancement | Status: open Priority: wish | Component: avformat Version: git-master | Resolution: Keywords: mpegps | Blocked By: pulldown mpeg2video | Blocking: | Reproduced by developer: 1 Analyzed by developer: 0 | -------------------------------------+------------------------------------- Changes (by MetalThrashingManiac): * cc: stw392@… (added) Comment: This implementation is based on the one in mpeg2enc and the like. It does not affect the encoding process, it just changes some flags in the bitstream, as e.g. DGPulldown does. Will be activated by -telecine:v 1 private option. Works with 24000/1001 and 24 fps progressive content. -- Ticket URL: <https://trac.ffmpeg.org/ticket/2602#comment:11> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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Re: [FFmpeg-trac] #2602(avformat:open): Implement a soft-telecine filter
by FFmpeg 03 Oct '20

03 Oct '20

#2602: Implement a soft-telecine filter -------------------------------------+------------------------------------- Reporter: microchip | Owner: Type: enhancement | Status: open Priority: wish | Component: avformat Version: git-master | Resolution: Keywords: mpegps | Blocked By: pulldown mpeg2video | Blocking: | Reproduced by developer: 1 Analyzed by developer: 0 | -------------------------------------+------------------------------------- Changes (by MetalThrashingManiac): * Attachment "ffmpeg-telecine.diff" added. Possible telecine implementation inside mpeg2video enc -- Ticket URL: <https://trac.ffmpeg.org/ticket/2602> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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#6263(undetermined:new): MPEG TS: A/V async issue when remuxing. Plays fine in MPV
by FFmpeg 02 Oct '20

02 Oct '20

#6263: MPEG TS: A/V async issue when remuxing. Plays fine in MPV -------------------------------------+------------------------------------- Reporter: peter_b | Type: defect Status: new | Priority: normal Component: | Version: undetermined | unspecified Keywords: mpegts | Blocked By: async vsync | Reproduced by developer: 0 Blocking: | Analyzed by developer: 0 | -------------------------------------+------------------------------------- Summary of the bug: I have off-the-air recordings: H.264/AAC in an MPEG-TS (.ts) file. For archiving, I uncompress the audio to pcm_s16le, and the container to MKV. I have a file where audio/video goes completely out of sync after a certain position in the video. I've isolated the culprit part of the video using "dd". I've tried the following commands: {{{ $FFMPEG -i $IN -c copy ${OUT}-copy.ts $FFMPEG -i $IN -c copy -vsync passthrough ${OUT}-vsync_pass.ts $FFMPEG -i $IN -c copy -vsync cfr ${OUT}-vsync_cfr.ts $FFMPEG -i $IN -c copy -vsync vfr ${OUT}-vsync_vfr.ts $FFMPEG -i $IN -c copy -vsync drop ${OUT}-vsync_drop.ts $FFMPEG -i $IN -c:v copy -c:a pcm_s16le ${OUT}-pcm_s16le.ts $FFMPEG -i $IN -c:v copy -c:a pcm_s16le -af "aresample=async=1000" ${OUT}-aresample.mkv }}} None of them produce a clean output :( The commercial clip starting at offset 26s seems to be defect. The file plays fine in [http://mpv.io/ MPV Media Player], so I guess there must be a way to fix the timestamps somehow? Here's the complete, uncut (*) console output from the first of the above commands I've tried: {{{ $ ffmpeg -i nd_vs_v-cut2.ts -c copy out.ts }}} (*) I've removed a long number of repeating "decode_slice_header error" messages, since they were identical to the first one. {{{ ffmpeg version N-84661-g66c1c9b Copyright (c) 2000-2017 the FFmpeg developers built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609 configuration: --prefix=/usr/local --enable-gpl --enable-nonfree --enable-version3 --enable-postproc --enable-swscale --enable-avfilter --enable-pthreads --enable-bzlib --enable-zlib --enable-decoder=png --enable-encoder=png --samples=../fate-suite --enable-libfreetype --enable-libschroedinger --enable-libopenjpeg --disable-decoder=jpeg2000 --enable-libvpx --enable-libvorbis --enable-libx264 libavutil 55. 51.100 / 55. 51.100 libavcodec 57. 86.103 / 57. 86.103 libavformat 57. 67.100 / 57. 67.100 libavdevice 57. 3.101 / 57. 3.101 libavfilter 6. 78.100 / 6. 78.100 libswscale 4. 3.101 / 4. 3.101 libswresample 2. 4.100 / 2. 4.100 libpostproc 54. 2.100 / 54. 2.100 [h264 @ 0x3f6e040] non-existing PPS 0 referenced Last message repeated 1 times [h264 @ 0x3f6e040] decode_slice_header error [h264 @ 0x3f6e040] no frame! [h264 @ 0x3f6e040] non-existing PPS 0 referenced Last message repeated 1 times [h264 @ 0x3f6e040] decode_slice_header error [h264 @ 0x3f6e040] no frame! [h264 @ 0x3f6e040] non-existing PPS 0 referenced ... ... ... Input #0, mpegts, from 'nd_vs_v-cut2.ts': Duration: 00:03:18.03, start: 434.773333, bitrate: 1440 kb/s Program 1 Stream #0:0[0x101]: Audio: aac (HE-AAC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 59 kb/s Stream #0:1[0x102]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(progressive), 1280x720, 30 fps, 29.97 tbr, 90k tbn, 60 tbc Stream #0:2[0x103]: Data: timed_id3 (ID3 / 0x20334449) Output #0, mpegts, to 'out/out.ts': Metadata: encoder : Lavf57.67.100 Stream #0:0: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(progressive), 1280x720, q=2-31, 30 fps, 29.97 tbr, 90k tbn, 90k tbc Stream #0:1: Audio: aac (HE-AAC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 59 kb/s Stream mapping: Stream #0:1 -> #0:0 (copy) Stream #0:0 -> #0:1 (copy) Press [q] to stop, [?] for help [mpegts @ 0x3f68360] DTS 8589934592 < 8590832488 out of orderitrate=4346.8kbits/s speed=30.8x [mpegts @ 0x3f68360] DTS 55209870 < 8592634286 out of order9 bitrate=2633.7kbits/s speed=46.9x frame= 2589 fps=1058 q=-1.0 Lsize= 35793kB time=00:01:37.25 bitrate=3014.9kbits/s speed=39.7x video:32062kB audio:838kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 8.791791% }}} -- Ticket URL: <https://trac.ffmpeg.org/ticket/6263> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker

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