H264 decoder Help please

[faam]

Hi
May I ask you if you know a free h264 decoder that could decode HD video in half resolution because I could not view any in my 6 years old laptop it becomes jerky with 100% cpu usage

Thanks in advance

[Dark Shikari]

Not possible.

[LoRd_MuldeR]

Hi
May I ask you if you know a free h264 decoder that could decode HD video in half resolution because I could not view any in my 6 years old laptop it becomes jerky with 100% cpu usage

Thanks in advance

You can re-encode to a lower resolution and then watch the "low resolution" version. For the re-encoding process the decoding doesn't have to happen in realtime.

(Of course re-encoding will take quite some time, but that's something your can run over night, or alike)

[mindbomb]

wait a minute, 6 years ago, as in 2005? so you have a core duo?

have you tried divx h264 decoder with multithreading?

[Blue_MiSfit]

Indeed. You can skip deblocking, and also try different renderers. I'm assuming you're using a DirectShow based player on Windows of course ;)

Derek

[faam]

guys I m so happy that you respond to me thanks a lot

[faam]

Not possible.

I think yes it is possible why is that because the commercial codec of MainConcept Do that and It is as far as I know it is the only one AND I hve no money to buy one
thats why I need free software.

[faam]

Indeed. You can skip deblocking, and also try different renderers. I'm assuming you're using a DirectShow based player on Windows of course ;)

Derek
it is possible as you mentioned but the quality is poor

[faam]

wait a minute, 6 years ago, as in 2005? so you have a core duo?

have you tried divx h264 decoder with multithreading?

Sorry man my CPU is Pentium M and my GPU with no AVC acceleration

[faam]

You can re-encode to a lower resolution and then watch the "low resolution" version. For the re-encoding process the decoding doesn't have to happen in realtime.

(Of course re-encoding will take quite some time, but that's something your can run over night, or alike)

I had tried it will takes 5 times the length of the video

[nm]

Have you tried playing your videos with VLC or MPlayer? Libavcodec might be fast enough for 720p24 playback at least.

I had tried it will takes 5 times the length of the video

It should be possible to get faster encoding speeds. On a single core of a 2 GHz Core 2 Duo, FFmpeg encodes 1280x720 H.264 video to MPEG-4 ASP at 30 fps, so your Pentium M should do the same at ~15 fps (unless it's one of the early Banias models). Command-line:

ffmpeg -i input.mkv -vcodec mpeg4 -acodec copy -qscale 4 output.mkv

1920x1080 should encode at ~8 fps, but you can perhaps speed it up a bit by downscaling to the resolution of your display.

[Dark Shikari]

I think yes it is possible why is that because the commercial codec of MainConcept Do that and It is as far as I know it is the only one AND I hve no money to buy one
thats why I need free software.You could certainly output to a lower resolution, yes, but it wouldn't be any faster. In fact, it would be slower, because you'd have to scale it down.

Obviously, you don't have Mainconcept's software, so I doubt you haven't seen it actually work as you expect!