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SJ2P223MB1152 Subject: Re: [FFmpeg-devel] Captions SCC X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches <ffmpeg-devel.ffmpeg.org> List-Unsubscribe: <https://ffmpeg.org/mailman/options/ffmpeg-devel>, <mailto:ffmpeg-devel-request@ffmpeg.org?subject=unsubscribe> List-Archive: <https://ffmpeg.org/pipermail/ffmpeg-devel> List-Post: <mailto:ffmpeg-devel@ffmpeg.org> List-Help: <mailto:ffmpeg-devel-request@ffmpeg.org?subject=help> List-Subscribe: <https://ffmpeg.org/mailman/listinfo/ffmpeg-devel>, <mailto:ffmpeg-devel-request@ffmpeg.org?subject=subscribe> Reply-To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org> Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" <ffmpeg-devel-bounces@ffmpeg.org> Archived-At: <https://master.gitmailbox.com/ffmpegdev/DM8P223MB0365B0CF96BC60164FA54FCCBAF12@DM8P223MB0365.NAMP223.PROD.OUTLOOK.COM/> List-Archive: <https://master.gitmailbox.com/ffmpegdev/> List-Post: <mailto:ffmpegdev@gitmailbox.com> > -----Original Message----- > From: ffmpeg-devel <ffmpeg-devel-bounces@ffmpeg.org> On Behalf Of > Devlist Archive > Sent: Friday, February 7, 2025 8:31 PM > To: FFmpeg development discussions and patches <ffmpeg- > devel@ffmpeg.org> > Subject: Re: [FFmpeg-devel] Captions SCC > > > > > The cc_fifo mechanism is actually implemented within the various > > filters which change the framerate (deinterlacing, framerate > > conversion, interlacing), so no extra command line arguments are > > required. There are some edge cases though that don't properly > handle > > it, and those mainly relate to cases such as the captions crossing > > back/forth between SEI and dedicated caption tracks (e.g. MP4 with > a > > caption track, the subcc output, etc). > > > > Ok, based on this information I am going to make a bug report ticket > for > the particular type of mp4 files I am using because while some > caption data > is passed, it is garbled and the transcoding process is producing > errors. > I was not aware that some work had been done to try to solve the > frame rate > conversion issue already as the behaviour of ffmpeg implies that it > doesn't > try to compensate for those changes for the file types I am working > with. > There are also bugs in the subcc function that seem to be affecting > display > time and other metadata. > > I assume that it would be more efficient and better to fix the > existing 608 > only data path before trying to expand things to include 708? > > Zach Unfortunately, there's no bug which could be "fixed". For a proper solution, a CEA-608 ENcoder is required. And more - like already said. sw _______________________________________________ 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".