Re: [FFmpeg-user] Framerate automatically increased while cropping
Am 24.08.21 um 13:51 schrieb Ulf Zibis: Am 23.08.21 um 07:15 schrieb Adam Nielsen via ffmpeg-user: why is the framerate automatically changed here from 29.98 fps to 120 fps, and how can I prevent from this ? Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720, 2508 kb/s, 29.98 fps, 120 tbr, 90k tbn, 2k tbc (default) From what I can find, "tbr" is the target framerate the media is indicating it wants. This is interesting. Thanks for the info. I would interpret this as meant for the playback of the video, e.g. for the ffplay. And why isn't it abreviated with "tfr" ? So ffmpeg is just respecting that value. With that contract I do hard, because in result I get a video with 15 % more bitrate and with lower quality, q=33.0 instead q=29.0. So I think, ffmpeg should retain the original bitrate and just propagate the tbr to be interpreted by the player. I guess you could use the -r option to override this and force a specific framerate if you want something different? Yes, this works fine. But I would appreciate, if I could use something like -r=inputrate or --keep_framerate But with "-r 29.98" I get "tbr=29.98" instead the original 120, which I think would be correct. -Ulf ___ 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] Framerate automatically increased while cropping
Am 23.08.21 um 07:44 schrieb Gyan Doshi: You can add `-fpsmax 30` with v4.4 or newer. This will limit output rate to 30 if the input is higher else keep the original rate. With that I get a rate of 30 instead of the original 29.98, so each 50th frame gets duplicated, which I value as nonsense. -Ulf ___ 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] Framerate automatically increased while cropping
Am 23.08.21 um 07:15 schrieb Adam Nielsen via ffmpeg-user: why is the framerate automatically changed here from 29.98 fps to 120 fps, and how can I prevent from this ? Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720, 2508 kb/s, 29.98 fps, 120 tbr, 90k tbn, 2k tbc (default) From what I can find, "tbr" is the target framerate the media is indicating it wants. This is interesting. Thanks for the info. I would interpret this as meant for the playback of the video, e.g. for the ffplay. And why isn't it abreviated with "tfr" ? So ffmpeg is just respecting that value. With that contract I do hard, because in result I get a video with 15 % more bitrate and with lower quality, q=33.0 instead q=29.0. So I think, ffmpeg should retain the original bitrate and just propagate the tbr to be interpreted by the player. I guess you could use the -r option to override this and force a specific framerate if you want something different? Yes, this works fine. But I would appreciate, if I could use something like -r=inputrate or --keep_framerate Or you could fix the metadata in the source file to have the correct target framerate to begin with. Hm, this is not really convenient. -Ulf ___ 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".
