> 2016/06/21 8:52 P.M. Carl Eugen Hoyos <cehoyos<at>ag.or.at> wrote: > > 桃源老師 <xanadu6291 <at> dream.jp> writes: >> >> So this is the answer for my question right? >> >> Since my video is h264, it can be cut at non key frame even though >> I use "-codec copy". right? > > No, I just wanted to explain that valid h264 videos without > key frame exist, and that it should be possible to cut them.
OK I understand. > I cannot answer your original question, you have not even > shown complete, uncut console output (it is always required > if you need help here), nor provided an example input file. I uploaded a sample video to the following URL: http://www.mediafire.com/download/gx2h7p3kl6axwr9/sample.mp4.zip Command line is: $ ffmpeg -ss 00:00:30.666 -i sample.mp4 -ss 0 -c: copy test3.mp4 ffmpeg version N-79554-g9a6ae7f Copyright (c) 2000-2016 the FFmpeg developers built with Apple LLVM version 7.3.0 (clang-703.0.29) configuration: --prefix=/Volumes/ffmpeg_compile --pkg-config-flags=--static --disable-ffserver --enable-gpl --enable-version3 --enable-nonfree --enable-libmp3lame --enable-libfdk-aac --enable-libvo-amrwbenc --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvorbis --enable-libspeex --enable-libopus --enable-libgsm --enable-libtwolame --enable-libsoxr --enable-libwavpack --enable-libmodplug --enable-libopenjpeg --enable-libwebp --enable-libtheora --enable-libx264 --enable-libopenh264 --enable-libx265 --enable-libxvid --enable-libvpx --enable-libxavs --enable-libfreetype --enable-fontconfig --enable-libfribidi --enable-libass --enable-libbluray --enable-libvidstab --enable-librtmp --enable-libschroedinger --enable-libsnappy --enable-libzmq libavutil 55. 22.101 / 55. 22.101 libavcodec 57. 35.100 / 57. 35.100 libavformat 57. 34.103 / 57. 34.103 libavdevice 57. 0.101 / 57. 0.101 libavfilter 6. 44.100 / 6. 44.100 libswscale 4. 1.100 / 4. 1.100 libswresample 2. 0.101 / 2. 0.101 libpostproc 54. 0.100 / 54. 0.100 [h264 @ 0x104810a00] Increasing reorder buffer to 1 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'sample.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf57.34.103 Duration: 00:00:42.04, start: 0.000000, bitrate: 1527 kb/s Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 856x480 [SAR 1:1 DAR 107:60], 1394 kb/s, 29.97 fps, 29.97 tbr, 60k tbn (default) Metadata: handler_name : VideoHandler Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 125 kb/s (default) Metadata: handler_name : SoundHandler [mp4 @ 0x1038d3c00] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead. Last message repeated 1 times Output #0, mp4, to 'test3.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf57.34.103 Stream #0:0(und): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 856x480 [SAR 1:1 DAR 107:60], q=2-31, 1394 kb/s, 29.97 fps, 29.97 tbr, 60k tbn (default) Metadata: handler_name : VideoHandler Stream #0:1(und): Audio: aac (LC) ([64][0][0][0] / 0x0040), 48000 Hz, stereo, 125 kb/s (default) Metadata: handler_name : SoundHandler Stream mapping: Stream #0:0 -> #0:0 (copy) Stream #0:1 -> #0:1 (copy) Press [q] to stop, [?] for help frame= 260 fps=0.0 q=-1.0 Lsize= 1468kB time=00:00:11.33 bitrate=1060.7kbits/s speed= 574x video:1285kB audio:174kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.693997% > (And I am not sure if I understood your original question, was > it "I have a correctly looking output video but I expected it > to be broken"?) Sorry for my poor English. I don't expect the video would be broken. In other word, my question is if the resulting video is fine, is it correct to cut video on not key frame? Best Regards, // Miya aka. TougenRoushi
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