Clip from H264 file without re-encoding

[TruthOverFacts]

I have a film that's an H264 mp4 file, I'd like to take a clip from it without re-encoding or any type of conversion. Is this possible? If so, any suggestions on how to accomplish this?

Thanks,
TOF

[hellgauss]

Virtualdub2 in "Direct stream copy" mode. For video, the first frame of the new file must be a key frame [K]. You can see the tipe of frame in VirtualDub2 at the bottom of the window.

Choose "Direct Stream Copy" from the video and audio , trim video using the black arrows and save using "Export-->Stream Copy"

[kurkosdr]

If you want to keep the H.264 encoding (aka if you want to not have the video converted to uncompressed), you can only take whole group-of-pictures. In other words, you can only "cut" on I-frames/keyframes. Avidemux can do that.