yuv420p vs yuv420p(tv)

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yuv420p vs yuv420p(tv)

George R. Welch
Hi folks,

I have two versions of the same video and I would like to only keep
one.  If one is higher quality, I'd obviously want to keep that one.  I
can't tell tell any difference through casual watching with VLC, so
perhaps it does not matter.

But anyway, when I run ffmpeg -i on the two, the difference is:

<     Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
1920x1080, 4011 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc (default)
---
 >     Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661),
yuv420p(tv), 1920x1080 [SAR 1:1 DAR 16:9], 4173 kb/s, 29.97 fps, 29.97
tbr, 90k tbn, 59.94 tbc (default)

I think I understand the difference between yuv420p(pc) and yuv420p(tv),
but here I have yuv420p vs yuv420p(tv).

Can someone offer suggestions as to which of these two videos might be
the better encoding?

Thanks,

--George
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Re: yuv420p vs yuv420p(tv)

Paul B Mahol
On 9/9/19, George R. Welch <[hidden email]> wrote:

> Hi folks,
>
> I have two versions of the same video and I would like to only keep
> one.  If one is higher quality, I'd obviously want to keep that one.  I
> can't tell tell any difference through casual watching with VLC, so
> perhaps it does not matter.
>
> But anyway, when I run ffmpeg -i on the two, the difference is:
>
> <     Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
> 1920x1080, 4011 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc (default)
> ---
>  >     Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661),
> yuv420p(tv), 1920x1080 [SAR 1:1 DAR 16:9], 4173 kb/s, 29.97 fps, 29.97
> tbr, 90k tbn, 59.94 tbc (default)
>
> I think I understand the difference between yuv420p(pc) and yuv420p(tv),
> but here I have yuv420p vs yuv420p(tv).
>
> Can someone offer suggestions as to which of these two videos might be
> the better encoding?

You should not trust anyone giving you such answer by comparing only
metadata and not actual data.

>
> Thanks,
>
> --George
> _______________________________________________
> ffmpeg-user mailing list
> [hidden email]
> https://ffmpeg.org/mailman/listinfo/ffmpeg-user
>
> To unsubscribe, visit link above, or email
> [hidden email] with subject "unsubscribe".
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Re: yuv420p vs yuv420p(tv)

George R. Welch
On 9/9/19 9:02 AM, Paul B Mahol wrote:

> On 9/9/19, George R. Welch <[hidden email]> wrote:
>> Hi folks,
>>
>> I have two versions of the same video and I would like to only keep
>> one.  If one is higher quality, I'd obviously want to keep that one.  I
>> can't tell tell any difference through casual watching with VLC, so
>> perhaps it does not matter.
>>
>> But anyway, when I run ffmpeg -i on the two, the difference is:
>>
>> <     Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
>> 1920x1080, 4011 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc (default)
>> ---
>>   >     Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661),
>> yuv420p(tv), 1920x1080 [SAR 1:1 DAR 16:9], 4173 kb/s, 29.97 fps, 29.97
>> tbr, 90k tbn, 59.94 tbc (default)
>>
>> I think I understand the difference between yuv420p(pc) and yuv420p(tv),
>> but here I have yuv420p vs yuv420p(tv).
>>
>> Can someone offer suggestions as to which of these two videos might be
>> the better encoding?
> You should not trust anyone giving you such answer by comparing only
> metadata and not actual data.

Thank you.  I should add that I do know that the only difference between
the videos is the encoding scheme.  Both were produced from the same
master.  It's just that I don't know what was done (and can't find out
easily).

My hope was that ffmpeg's output could offer me a clue about the
encodings of the two, from which I could make an educated guess about
which one might be better (if either).

If one can't tell from this, I'm happy to flip a coin.  But does anyone
know the difference between yuv420p and yuv420p(tv).  As opposed to
yuv420p(pc) vs yuv420p(tv), I mean.

Best,

--George
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