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Thu, 3 Mar 2022 04:40:27 -0800 (PST) In-Reply-To: References: <20220224203039.CD4BB41059B@natalya.videolan.org> From: Paul B Mahol Date: Thu, 3 Mar 2022 13:40:27 +0100 Message-ID: To: FFmpeg development discussions and patches Subject: Re: [FFmpeg-devel] [FFmpeg-cvslog] avfilter/vf_tpad: if there is no frame to clone return early X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Archived-At: List-Archive: List-Post: On 2/28/22, Thierry Foucu wrote: > On Sun, Feb 27, 2022 at 3:54 AM Paul B Mahol wrote: > >> On Fri, Feb 25, 2022 at 10:08 PM Thierry Foucu wrote: >> >> > On Thu, Feb 24, 2022 at 11:50 PM Paul B Mahol wrote: >> > >> > > On Thu, Feb 24, 2022 at 11:21 PM Thierry Foucu >> wrote: >> > > >> > > > On Thu, Feb 24, 2022 at 2:19 PM Thierry Foucu >> > wrote: >> > > > >> > > > > >> > > > > >> > > > > On Thu, Feb 24, 2022 at 1:50 PM Paul B Mahol >> > wrote: >> > > > > >> > > > >> On Thu, Feb 24, 2022 at 10:36 PM Thierry Foucu >> > > > >> >> > > > wrote: >> > > > >> >> > > > >> > On Thu, Feb 24, 2022 at 1:28 PM Paul B Mahol >> > > > >> > >> > > > wrote: >> > > > >> > >> > > > >> > > On Thu, Feb 24, 2022 at 10:12 PM Thierry Foucu < >> > tfoucu@gmail.com> >> > > > >> wrote: >> > > > >> > > >> > > > >> > > > On Thu, Feb 24, 2022 at 12:30 PM Paul B Mahol < >> > git@videolan.org >> > > > >> > > > >> > wrote: >> > > > >> > > > >> > > > >> > > > > ffmpeg | branch: master | Paul B Mahol >> > > > >> > > > > >> | >> > > Thu >> > > > >> Feb >> > > > >> > 24 >> > > > >> > > > > 20:32:41 2022 +0100| >> > > [3715f2f8643695940582ce040b7a052cccfb9db2] >> > > > | >> > > > >> > > > > committer: Paul B Mahol >> > > > >> > > > > >> > > > >> > > > > avfilter/vf_tpad: if there is no frame to clone return >> early >> > > > >> > > > > >> > > > >> > > > > > >> > > > >> > > > > >> > > > >> > > > >> > > > >> > > >> > > > >> > >> > > > >> >> > > > >> > > >> > >> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=3715f2f8643695940582ce040b7a052cccfb9db2 >> > > > >> > > > > --- >> > > > >> > > > > >> > > > >> > > > > libavfilter/vf_tpad.c | 5 +++++ >> > > > >> > > > > 1 file changed, 5 insertions(+) >> > > > >> > > > > >> > > > >> > > > > diff --git a/libavfilter/vf_tpad.c >> > > > >> > > > > b/libavfilter/vf_tpad.c >> > > > >> > > > > index e5acece1e4..120dbcb4d3 100644 >> > > > >> > > > > --- a/libavfilter/vf_tpad.c >> > > > >> > > > > +++ b/libavfilter/vf_tpad.c >> > > > >> > > > > @@ -148,6 +148,11 @@ static int activate(AVFilterContext >> > *ctx) >> > > > >> > > > > frame->data, >> frame->linesize, >> > > > >> > > > > 0, 0, frame->width, >> > > > frame->height); >> > > > >> > > > > } else if (s->stop_mode == 1) { >> > > > >> > > > > + if (!s->cache_stop) { >> > > > >> > > > > + s->pad_stop = 0; >> > > > >> > > > > + ff_outlink_set_status(outlink, >> AVERROR_EOF, >> > > > >> s->pts); >> > > > >> > > > > + return 0; >> > > > >> > > > > + } >> > > > >> > > > > frame = av_frame_clone(s->cache_stop); >> > > > >> > > > > if (!frame) >> > > > >> > > > > return AVERROR(ENOMEM); >> > > > >> > > > > >> > > > >> > > > > >> > > > >> > > > The problem with this solution is that the tpad will then >> not >> > do >> > > > >> what >> > > > >> > we >> > > > >> > > > are expecting, which is padding video track, and the >> > > > >> > > > output >> > file >> > > > >> will >> > > > >> > not >> > > > >> > > > have the desired duration. >> > > > >> > > > Will it not be better to just output black frame (aka >> > stop_mode >> > > == >> > > > >> 0) , >> > > > >> > > > something like that? >> > > > >> > > > >> > > > >> > > >> > > > >> > > I doubt that, clone is clone, there is no point in padding >> > stream >> > > > that >> > > > >> > have >> > > > >> > > no frames at all. >> > > > >> > > >> > > > >> > > >> > > > >> > > >> > > > >> > The sample I forwarded to JB has video frames. The problem was >> > that >> > > > >> there >> > > > >> > was a re-init of the filter chain after a resolution change >> > > > >> > and >> > > after >> > > > >> the >> > > > >> > re-init, there were no frames but got frames before the >> > > > >> > re-init. >> > > > >> > I will understand for a media file which has NEVER received a >> > video >> > > > >> frame >> > > > >> > and in this case, this is the correct solution. >> > > > >> > >> > > > >> >> > > > >> Hmm, so you encode output with resolution change, why not use >> scale >> > > > filter >> > > > >> as first filter and then no resolution ever change for rest of >> > graph? >> > > > >> Adding support for resolution changes to all filters is very >> > > > >> time >> > > > >> consuming >> > > > >> task and I see no real benefit in doing that now. >> > > > >> >> > > > > >> > > > > We do have the scale filter in front of the tpad filter. Here is >> the >> > > > > filter chain we are using >> > > > > >> > > > > >> > > > >> > > >> > >> idet=1.04:1.5,yadif=0:-1:1,scale=+528:+864:flags=bicubic,setsar=1,fps=fps=16.601,tpad=stop_mode=clone:stop_duration=2808ms >> > > > > >> > > > >> > > >> > > Is this just increasing size instead of setting constant one? >> > > >> > >> > Nope. It will just scale the video to 528x864 >> > >> >> Then why filter is still reinited then? >> Looks like serious bug to me. >> > > Here is the verbose log when running ffmpeg with the filter chain. The > input resolution went from 1280x692 then changed to 1280x720 followed by > 1280x718 > And from the log, it is clear that the filter chain is being re-initialize. > All filters should not be reinitialized if only dimension change for first filter. This is current libavfilter limitation AFAIK. > Input #0, matroska,webm, from '/tmp/crash_tpad': > Metadata: > ENCODER : Lavf58.76.100 > Duration: 00:08:07.44, start: 0.000000, bitrate: 78 kb/s > Stream #0:0(eng): Video: vp9 (Profile 0), 1 reference frame, yuv420p(tv), > 1280x692, SAR 1:1 DAR 320:173, 59.94 fps, 59.94 tbr, 1k tbn (default) > Metadata: > ALPHA_MODE : 1 > DURATION : 00:08:06.780000000 > Stream #0:1(eng): Audio: opus, 48000 Hz, mono, fltp (default) > Metadata: > DURATION : 00:08:07.440000000 > Stream mapping: > Stream #0:0 -> #0:0 (vp9 (native) -> wrapped_avframe (native)) > Stream #0:1 -> #0:1 (opus (native) -> pcm_s16le (native)) > Press [q] to stop, [?] for help > [graph_1_in_0_1 @ 0x55df4ff5f180] tb:1/48000 samplefmt:fltp > samplerate:48000 chlayout:0x4 > [format_out_0_1 @ 0x55df4ff5fd40] auto-inserting filter 'auto_aresample_0' > between the filter 'Parsed_anull_0' and the filter 'format_out_0_1' > [auto_aresample_0 @ 0x55df4ff61340] ch:1 chl:mono fmt:fltp r:48000Hz -> > ch:1 chl:mono fmt:s16 r:48000Hz > [Parsed_scale_2 @ 0x55df4ffa7040] w:+528 h:+864 flags:'bicubic' interl:0 > [graph 0 input from stream 0:0 @ 0x55df4ffab580] w:1280 h:692 > pixfmt:yuv420p tb:1/1000 fr:19001/317 sar:1/1 > [Parsed_scale_2 @ 0x55df4ffa7040] w:1280 h:692 fmt:yuv420p sar:1/1 -> w:528 > h:864 fmt:yuv420p sar:5760/1903 flags:0x4 > [Parsed_setsar_3 @ 0x55df4ffa7e80] w:528 h:864 sar:5760/1903 dar:320/173 -> > sar:1/1 dar:11/18 > [Parsed_fps_4 @ 0x55df4ffa8880] fps=16601/1000 > [Parsed_fps_4 @ 0x55df4ffa8880] Set first pts to 0 > Output #0, null, to 'pipe:': > Metadata: > encoder : Lavf59.17.102 > Stream #0:0(eng): Video: wrapped_avframe, 1 reference frame, yuv420p(tv, > progressive), 528x864 (0x0) [SAR 1:1 DAR 11:18], q=2-31, 200 kb/s, 16.60 > fps, 16.60 tbn (default) > Metadata: > ALPHA_MODE : 1 > DURATION : 00:08:06.780000000 > encoder : Lavc59.21.100 wrapped_avframe > Stream #0:1(eng): Audio: pcm_s16le, 48000 Hz, mono, s16, 768 kb/s > (default) > Metadata: > DURATION : 00:08:07.440000000 > encoder : Lavc59.21.100 pcm_s16le > [Parsed_idet_0 @ 0x55df4ffa0700] Repeated Fields: Neither: 88 Top: 0 > Bottom: 0 > [Parsed_idet_0 @ 0x55df4ffa0700] Single frame detection: TFF: 0 BFF: > 0 Progressive: 1 Undetermined: 87 > [Parsed_idet_0 @ 0x55df4ffa0700] Multi frame detection: TFF: 0 BFF: > 0 Progressive: 1 Undetermined: 87 > [Parsed_fps_4 @ 0x55df4ffa8880] 87 frames in, 62 frames out; 27 frames > dropped, 2 frames duplicated. > [Parsed_scale_2 @ 0x55df4ffaa1c0] w:+528 h:+864 flags:'bicubic' interl:0 > [graph 0 input from stream 0:0 @ 0x55df4ff94140] w:1280 h:720 > pixfmt:yuv420p tb:1/1000 fr:19001/317 sar:1/1 > [scaler_out_0_0 @ 0x55df4ff9de00] w:528 h:864 flags:'' interl:0 > [Parsed_scale_2 @ 0x55df4ffaa1c0] w:1280 h:720 fmt:yuv420p sar:1/1 -> w:528 > h:864 fmt:yuv420p sar:32/11 flags:0x4 > [Parsed_setsar_3 @ 0x55df4ffaea40] w:528 h:864 sar:32/11 dar:16/9 -> > sar:1/1 dar:11/18 > [Parsed_fps_4 @ 0x55df4ff91fc0] fps=16601/1000 > [scaler_out_0_0 @ 0x55df4ff9de00] w:528 h:864 fmt:yuv420p sar:1/1 -> w:528 > h:864 fmt:yuv420p sar:1/1 flags:0x0 > [Parsed_fps_4 @ 0x55df4ff91fc0] Set first pts to 64 > [Parsed_idet_0 @ 0x55df4ff9bd00] Repeated Fields: Neither: 998 Top: 0 > Bottom: 2 > [Parsed_idet_0 @ 0x55df4ff9bd00] Single frame detection: TFF: 0 BFF: > 0 Progressive: 11 Undetermined: 989 > [Parsed_idet_0 @ 0x55df4ff9bd00] Multi frame detection: TFF: 0 BFF: > 0 Progressive: 1000 Undetermined: 0 > [Parsed_fps_4 @ 0x55df4ff91fc0] 999 frames in, 8004 frames out; 39 frames > dropped, 7044 frames duplicated. > [Parsed_scale_2 @ 0x55df50130e80] w:+528 h:+864 flags:'bicubic' interl:0 > [graph 0 input from stream 0:0 @ 0x55df5029dd00] w:1280 h:718 > pixfmt:yuv420p tb:1/1000 fr:19001/317 sar:1/1 > [scaler_out_0_0 @ 0x55df4ff93640] w:528 h:864 flags:'' interl:0 > [Parsed_scale_2 @ 0x55df50130e80] w:1280 h:718 fmt:yuv420p sar:1/1 -> w:528 > h:864 fmt:yuv420p sar:11520/3949 flags:0x4 > [Parsed_setsar_3 @ 0x55df50413380] w:528 h:864 sar:11520/3949 dar:640/359 > -> sar:1/1 dar:11/18 > [Parsed_fps_4 @ 0x55df4ff7af80] fps=16601/1000 > [scaler_out_0_0 @ 0x55df4ff93640] w:528 h:864 fmt:yuv420p sar:1/1 -> w:528 > h:864 fmt:yuv420p sar:1/1 flags:0x0 > [Parsed_fps_4 @ 0x55df4ff7af80] Set first pts to 8081 > No more output streams to write to, finishing. > frame= 8066 fps=1787 q=-0.0 Lsize=N/A time=00:08:07.44 bitrate=N/A speed= > 108x > video:3529kB audio:45698kB subtitle:0kB other streams:0kB global > headers:0kB muxing overhead: unknown > Input file #0 (/tmp/crash_tpad): > Input stream #0:0 (video): 1091 packets read (1667477 bytes); 1091 frames > decoded; > Input stream #0:1 (audio): 8124 packets read (3026650 bytes); 8124 frames > decoded (23397120 samples); > Total: 9215 packets (4694127 bytes) demuxed > Output file #0 (pipe:): > Output stream #0:0 (video): 8066 frames encoded; 8066 packets muxed > (3613568 bytes); > Output stream #0:1 (audio): 8124 frames encoded (23397120 samples); 8124 > packets muxed (46794240 bytes); > Total: 16190 packets (50407808 bytes) muxed > [Parsed_idet_0 @ 0x55df4ff7f8c0] Repeated Fields: Neither: 1 Top: 0 > Bottom: 0 > [Parsed_idet_0 @ 0x55df4ff7f8c0] Single frame detection: TFF: 0 BFF: > 0 Progressive: 0 Undetermined: 1 > [Parsed_idet_0 @ 0x55df4ff7f8c0] Multi frame detection: TFF: 0 BFF: > 0 Progressive: 0 Undetermined: 1 > [Parsed_fps_4 @ 0x55df4ff7af80] 1 frames in, 0 frames out; 1 frames > dropped, 0 frames duplicated. > [AVIOContext @ 0x55df4fe98180] Statistics: 4759868 bytes read, 0 seeks > > > >> >> >> > >> > >> > > >> > > >> > > > > And it does crash. >> > > > > >> > > > > Even just >> > > > > fps=fps=16.601,tpad=stop_mode=clone:stop_duration=2808ms >> > > > > reproduce the problem. >> > > > > >> > > > >> > > > Maybe an option to the tpad filter to decide what should be the >> output >> > > when >> > > > the stop_mode == 1 and cache_stop is NULL? >> > > > So, in some cases, people may want a color frame, and some other >> > > > will >> > > just >> > > > want to exit right away? >> > > > >> > > >> > > That is too much for a special option. >> > > >> > >> > I understand. >> > I'm just worried that due to some re-init of the filter chain and the >> fact >> > there are filters which may or may not output a frame after the >> > re-init, >> > the tpad filter will then have no cache frame to clone. And in this >> > case, >> > the file does not have the length expected. >> > >> > I guess if it is documented or av_log, people will be aware of the >> > potential issue. >> > >> > Anyway, thanks a lot for the quick fix. >> > >> > >> > > > >> > > > >> > > > > >> > > > > >> > > > >> >> > > > >> >> > > > >> > >> > > > >> > >> > > > >> > > > >> > > > >> > > > iff --git a/libavfilter/vf_tpad.c b/libavfilter/vf_tpad.c >> > > > >> > > > index e5acece1e4..5e4062e9f2 100644 >> > > > >> > > > --- a/libavfilter/vf_tpad.c >> > > > >> > > > +++ b/libavfilter/vf_tpad.c >> > > > >> > > > @@ -140,7 +140,7 @@ static int activate(AVFilterContext >> *ctx) >> > > > >> > > > ff_outlink_set_status(outlink, AVERROR_EOF, >> > > s->pts); >> > > > >> > > > return 0; >> > > > >> > > > } >> > > > >> > > > - if (s->stop_mode == 0) { >> > > > >> > > > + if (s->stop_mode == 0 || !s->cache_stop) { >> > > > >> > > > frame = ff_get_video_buffer(outlink, >> outlink->w, >> > > > >> > > outlink->h); >> > > > >> > > > if (!frame) >> > > > >> > > > return AVERROR(ENOMEM); >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > > _______________________________________________ >> > > > >> > > > > ffmpeg-cvslog mailing list >> > > > >> > > > > ffmpeg-cvslog@ffmpeg.org >> > > > >> > > > > https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog >> > > > >> > > > > >> > > > >> > > > > To unsubscribe, visit link above, or email >> > > > >> > > > > ffmpeg-cvslog-request@ffmpeg.org with subject >> > "unsubscribe". >> > > > >> > > > > >> > > > >> > > > >> > > > >> > > > >> > > > >> > > > -- >> > > > >> > > > >> > > > >> > > > Thierry Foucu >> > > > >> > > > _______________________________________________ >> > > > >> > > > ffmpeg-devel mailing list >> > > > >> > > > ffmpeg-devel@ffmpeg.org >> > > > >> > > > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel >> > > > >> > > > >> > > > >> > > > To unsubscribe, visit link above, or email >> > > > >> > > > ffmpeg-devel-request@ffmpeg.org with subject >> > > > >> > > > "unsubscribe". >> > > > >> > > > >> > > > >> > > _______________________________________________ >> > > > >> > > ffmpeg-devel mailing list >> > > > >> > > ffmpeg-devel@ffmpeg.org >> > > > >> > > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel >> > > > >> > > >> > > > >> > > To unsubscribe, visit link above, or email >> > > > >> > > ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe". >> > > > >> > > >> > > > >> > >> > > > >> > >> > > > >> > -- >> > > > >> > >> > > > >> > Thierry Foucu >> > > > >> > _______________________________________________ >> > > > >> > ffmpeg-devel mailing list >> > > > >> > ffmpeg-devel@ffmpeg.org >> > > > >> > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel >> > > > >> > >> > > > >> > To unsubscribe, visit link above, or email >> > > > >> > ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe". >> > > > >> > >> > > > >> _______________________________________________ >> > > > >> ffmpeg-devel mailing list >> > > > >> ffmpeg-devel@ffmpeg.org >> > > > >> https://ffmpeg.org/mailman/listinfo/ffmpeg-devel >> > > > >> >> > > > >> To unsubscribe, visit link above, or email >> > > > >> ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe". >> > > > >> >> > > > > >> > > > > >> > > > > -- >> > > > > >> > > > > Thierry Foucu >> > > > > >> > > > >> > > > >> > > > -- >> > > > >> > > > Thierry Foucu >> > > > _______________________________________________ >> > > > ffmpeg-devel mailing list >> > > > ffmpeg-devel@ffmpeg.org >> > > > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel >> > > > >> > > > To unsubscribe, visit link above, or email >> > > > ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe". >> > > > >> > > _______________________________________________ >> > > ffmpeg-devel mailing list >> > > ffmpeg-devel@ffmpeg.org >> > > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel >> > > >> > > To unsubscribe, visit link above, or email >> > > ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe". >> > > >> > >> > >> > -- >> > >> > Thierry Foucu >> > _______________________________________________ >> > ffmpeg-devel mailing list >> > ffmpeg-devel@ffmpeg.org >> > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel >> > >> > To unsubscribe, visit link above, or email >> > ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe". >> > >> _______________________________________________ >> ffmpeg-devel mailing list >> ffmpeg-devel@ffmpeg.org >> https://ffmpeg.org/mailman/listinfo/ffmpeg-devel >> >> To unsubscribe, visit link above, or email >> ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe". >> > > > -- > > Thierry Foucu > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe". > _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".