Re: [FFmpeg-user] MKV to MP4 subtitle issue
On Tue, Jan 17, 2023 at 10:02:59 +0100, pehache wrote: > > MP4 cannot carry those HDMV PGS subtitles (or any other bitmap based > > format, if I remember correctly). > > MP4 can carry the DVDSUB format, which is bitmap. Ah great, sorry, I wasn't aware (anymore) > The OP can give a try transcoding the PGS subtitles to DVDSUB, using "-c:s > dvdsub", but in my (limited) experience it often fails for some reason or > another. Indeed, I have always had problems converting any bitmap-based format to dvdsub. I may dig into it again, but the original poster should perhaps just try. Moritz ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] MKV to MP4 subtitle issue
Le 16/01/2023 à 11:47, Moritz Barsnick a écrit : MP4 cannot carry those HDMV PGS subtitles (or any other bitmap based format, if I remember correctly). MP4 can carry the DVDSUB format, which is bitmap. The OP can give a try transcoding the PGS subtitles to DVDSUB, using "-c:s dvdsub", but in my (limited) experience it often fails for some reason or another. ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] MKV to MP4 subtitle issue
On Tue, Jan 10, 2023 at 19:23:33 -0600, Steve Zemlicka wrote: > The question I have is similar to the following post: > https://superuser.com/questions/932730/ffmpeg-mkv-to-mp4-conversion-loses-subtitles Those answers are not helpful, because you have HDMV PGS, which is a bitmap format, that cannot be converted to ASS or SRT directly. > I am using ffmpeg version n5.1.2. I have an mkv that has two subtitle > tracks. I am trying to convert it to mp4. > > mkvmerge -i input.mkv > File 'input.mkv': container: Matroska > Track ID 0: video (HEVC/H.265/MPEG-H) > Track ID 1: audio (E-AC-3) > Track ID 2: subtitles (HDMV PGS) > Track ID 3: subtitles (HDMV PGS) > Chapters: 10 entries > > "subtitles=input.mkv:si=1" as per > http://ffmpeg.org/ffmpeg-filters.html#subtitles. Unfortunately this > results in an error: > "Unable to find a suitable output format for 'subtitles=input.mkv:si1'" > followed by: > "subtitles=input.mkv:si=1: Invalid argument" If you use the "subtitles" filter, you must declare it after the leading filter option "-vf". But, that said, the subtitles filter is actually meant for handling text-based subtitles. Which it what you presume here: > I've also tried several other options including "-c:s copy" which didn't > work due to the nature of the original subtitles (PGS) I suspect. MP4 cannot carry those HDMV PGS subtitles (or any other bitmap based format, if I remember correctly). Since you prefer hardsubs anyway, perhaps this method mentioned in ffmpeg's own wiki can be of help: https://trac.ffmpeg.org/wiki/HowToBurnSubtitlesIntoVideo#Picture-basedsubtitles BTW, here's a link on how to extract those bitmaps: https://superuser.com/q/1748962 You would need OCR to convert them to text-based. ffmpeg has no integration of such tools, but external tools are available. (I have one myserlf attempted to convert bitmap subs to text-based subs. It was a cumbersome process.) Cheers, Moritz ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-user] MKV to MP4 subtitle issue
The question I have is similar to the following post: https://superuser.com/questions/932730/ffmpeg-mkv-to-mp4-conversion-loses-subtitles I am using ffmpeg version n5.1.2. I have an mkv that has two subtitle tracks. I am trying to convert it to mp4. mkvmerge -i input.mkv File 'input.mkv': container: Matroska Track ID 0: video (HEVC/H.265/MPEG-H) Track ID 1: audio (E-AC-3) Track ID 2: subtitles (HDMV PGS) Track ID 3: subtitles (HDMV PGS) Chapters: 10 entries I believe Track ID 2 is for foreign dialog only and is the one I would prefer to use. I also prefer to use hardsubs but would take hard or soft subs at this point. I've tried a number of approaches with little success. The closest I've gotten is to issue the subtitle=input.mkv option. ffmpeg -i input.mkv -c:v hecv_nvenc -crf 26 -preset fast -c:a aac -b:a 128k subtitles=input.mkv output.mp4 I expected this to burn the subs to the video but oddly enough, it seemed to make an mp4 with a subtitle track to toggle. Unfortunately the subtitles are just the chapter names and not the actual subtitles. I've also tried to manually select different subtitle tracks by using "subtitles=input.mkv:si=1" as per http://ffmpeg.org/ffmpeg-filters.html#subtitles. Unfortunately this results in an error: "Unable to find a suitable output format for 'subtitles=input.mkv:si1'" followed by: "subtitles=input.mkv:si=1: Invalid argument" I've also tried several other options including "-c:s copy" which didn't work due to the nature of the original subtitles (PGS) I suspect. Am I doing something wrong or missing something? ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
