Yes - that's the exact issue - multiple aspect ratio changes, and I'm not sure how to find where they occur without a lot of complexity About 7 years ago Jarmo Torvinen proposed something to address this exact issue - did this ever reach the build, if so how to activate ? http://x264-devel.videolan.narkive.com/TlgcMaKZ/reconfiguring-x264-aspect-ratio-in-the-middle-of-stream
On 25/05/2016 13:53, chronek wrote: > Didnt read to end before, are you have 2 aspect ratio in stream? Then > you need split and process each part alone... > > W dniu 2016-05-25 o 11:18, Richard F pisze: >> Thanks for your reply, >> >> The stream info for this file is as follows. As you can see the DAR >> starts as 16:9, but the aspect changes several times during the >> recording, x264 doesn't follow the changes, stays at 16:9. >> >> If I force the SAR as you suggest the output is narrower than 4:3 and >> still doesn't change with incoming aspect changes. >> >> Input #0, mpegts, from '00001.ts': >> Duration: 00:59:49.47, start: 4529.649200, bitrate: 1477 kb/s >> Program 132 >> Stream #0:0[0x18a1]: Video: mpeg2video (Main) ([2][0][0][0] / >> 0x0002), yuv420p(tv), 544x576 [SAR 32:17 DAR 16:9], max. 15000 kb/s, 25 >> fps, 25 tbr, 90k tbn, 50 tbc >> Stream #0:1[0x18a2](eng): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 >> Hz, stereo, s16p, 128 kb/s >> Stream #0:2[0x18a3](eng): Audio: mp3 ([3][0][0][0] / 0x0003), 0 >> channels, s16p >> Stream #0:3[0x18a6](eng): Subtitle: dvb_subtitle ([6][0][0][0] / >> 0x0006) >> >> If I analyse the stream 5 minutes into the programme, like so: >> ffmpeg -loglevel quiet -ss 00:05:00 -i "00001.ts" -t 10 -c copy >> -avoid_negative_ts 1 -f nut pipe:1 | ffmpeg -hide_banner -i pipe:0 >> >> Then the video stream is as follows: >> >> Stream #0:0: Video: mpeg2video (Main) (mpg2 / 0x3267706D), yuv420p(tv), >> 544x576 [SAR 24:17 DAR 4:3], max. 15000 kb/s, SAR 32:17 DAR 16:9, 25 >> fps, 25 tbr, 90k tbn, 50 tbc >> >> So it is meant to show as 4:3 here. >> I'm assuming the 2 sets of SAR/DAR are for container and stream which is >> why it still shows as 16:9 after ffmpeg processing ? >> >> >> >> On 25/05/2016 08:10, chronek wrote: >>> Maybe your source not have sar 1:1... setdar will not change >>> resolution, it will change only information about aspectratio and some >>> players not read desired aspect ratio... Best try change to resolution >>> what yuou want and setsar for it... ( -vf scale=x:y,setsar=1 ) >>> >>> W dniu 2016-05-25 o 09:00, Richard F pisze: >>>> Hi list, >>>> >>>> I have a number of MPEG2 TS DVB recordings that have aspect ratio >>>> changes - e.g. older films or 4:3 programmes that have 16:9 >>>> continuity, trailers, adverts etc. >>>> >>>> I want to transcode to H264 using ffmpeg (3.02), but the output >>>> aspect ratio does not follow the source when using the H264 codec. >>>> But the aspect ratio does follow when using the xvid/mp4 codec. >>>> I need x264 not mp4. >>>> The problem is that (I think) the container DAR or SAR stays at 16:9 >>>> all the way through but the stream SAR or DAR doesn't follow the >>>> source for whatever reason >>>> >>>> Is there a way to make x264 output follow the source aspect ratio at >>>> the stream level ? >>>> >>>> Failing example : >>>> ffmpeg -y -i 00001.ts -map 0:0 -map 0:1 -map 0:3 -c:v libx264 -preset >>>> veryfast -profile:v high -level 4.0 -crf 20 -flags +loop -flags +ilme >>>> -vf yadif=0:-1:0 -c:a:0 aac -b:a:0 128k -c:s copy -f mpegts file-1.ts >>>> (same if I take out the profile and deinterlace settings) >>>> >>>> Working example (but large file and not so good quality, even if I >>>> could use it): >>>> ffmpeg -y -i 00001.ts -map 0:0 -map 0:1 -map 0:3 -c:v libxvid -q:v 3 >>>> -c:a:0 aac -b:a:0 128k -c:s copy -f mpegts file-1.ts >>>> >>>> If I add -vf setdar=dar=4/3, I can force the x264 version to be 4/3 >>>> but then all parts of the recording are always 4/3 which is also >>>> wrong. >>>> >>>> Behaviour is the same on VLC player, ffplay, and Kodi. >>>> >>>> Appreciate any pointers >>>> Thanks >>>> Richard >>>> >>>> >>>> >>>> _______________________________________________ >>>> ffmpeg-user mailing list >>>> [email protected] >>>> http://ffmpeg.org/mailman/listinfo/ffmpeg-user >>>> >>>> To unsubscribe, visit link above, or email >>>> [email protected] with subject "unsubscribe". >>> _______________________________________________ >>> ffmpeg-user mailing list >>> [email protected] >>> http://ffmpeg.org/mailman/listinfo/ffmpeg-user >>> >>> To unsubscribe, visit link above, or email >>> [email protected] with subject "unsubscribe". >> >> _______________________________________________ >> ffmpeg-user mailing list >> [email protected] >> http://ffmpeg.org/mailman/listinfo/ffmpeg-user >> >> To unsubscribe, visit link above, or email >> [email protected] with subject "unsubscribe". > > _______________________________________________ > ffmpeg-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe". _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
