Do you think FFmpeg is not able to demux/remux Panasonic GH4 (or LX100) 4K video MP4 properly? I would prefer one tool solution... Peter
> Date: Fri, 6 Feb 2015 14:25:46 -0500 > From: [email protected] > To: [email protected] > Subject: Re: [FFmpeg-user] AAC track copy problem in mp4 > > Maybe try demuxing it with MP4Box, resize with FFmpeg, then remux with > MP4Box? > http://gpac.wp.mines-telecom.fr/downloads/gpac-nightly-builds/ > > > On Fri, Feb 6, 2015 at 10:37 AM, Petr Tresnak <[email protected]> wrote: > > > Hi all, > > I downscale the following 4k to 1080 using ffmpeg -i 4k.mp4 -vf > > scale=1920:1080 -c:v libx264 -preset fast -crf 18 -c:a copy output.mp4" > > > > Duration: 00:00:10.56, start: 0.080000, bitrate: 95904 kb/ > > Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, > > bt709), 3840x2160 [SAR 1:1 DAR 16:9], 95655 kb/s, 25 fps > > Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, > > 124 kb/s (default) > > > > But there is a problem with proper copy of audio track: > > > > [mp4 @ 05e30860] track 1: codec frame size is not set > > [mp4 @ 05e30860] Packet with invalid duration -1024 in stream 1 > > > > In trans-coded video file there is a small difference in audio afterwards > > (AAC vs AAC LC, bitrate 124 vs 125): > > Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, > > fltp, 125 kb/s (default) > > > > Can you help how to force ffmpeg to copy audio track? > > Thanks > > Peter > > > > _______________________________________________ > > ffmpeg-user mailing list > > [email protected] > > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > > > _______________________________________________ > ffmpeg-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/ffmpeg-user _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user
