T54 Mp4 High Quality

I have 2 video files (input.mp4,leadout.mp4) and an image (watermark.png). I need to cut the first video to 54 seconds, add the watermark and then merge it with the second video.I achieved this calling ffmpeg 3 times:

T54 mp4

A 1948 U.S. Army film, auf Deutsch, depicting the never ending problems in French, British, U.S. zones (sectors) of West Berlin with electrical power and food/water supplies caused by the economic blockades of the Soviet controlled D.D.R., resulting in the famous Berlin Airlift:

A second U.S. Army film, also auf Deutsch, showing that the success of the Berlin Airlift did not decrease border tensions, with both the U.S. and Soviets building up military forces in the eastern and western zones of Germany:

In 1952, Soviet leader Joseph Stalin proposed to unify Germany as a politically neutral country, the puppet leaders of capitalist occupied West Germany (Federal Republic of Germany, Bundes Republik Deutschland, B.R.D.) rejected the proposal.

In response to the U.S. deployment of M48A1s, the Soviet Union (Union of Soviet Socialist Republics/Союз Советских Социалистических Республик, USSR/CCCP, the CCCP was not a country but an organization of individual Soviet Republics) deployed its latest tank; the T-54/55. Also notice the beginnings of The Wall in the form of barricades.

This is from a U.S. Berlin Brigade Operation Plan (BB-OpPlan), dated 05NOV1961 and approved by Brigadier General Frederick O. Hartel, showing that war was expected. It is only the second page of the 399 page BB-OpPlan!

Towards the end of August 1962, the U.S. Berlin Brigade seemingly engaged in a tit-for-tat by harassing CCCP military units as they were traveling to the Tiergarten Soviet War Memorial, located in the U.K. zone of West Berlin, to conduct the routine changing-of-the-guard. Again, at the end of World War Two the French, CCCP (Soviets), U.K. and U.S. victors agreed to allow free passage anywhere in Berlin.

The official reason Checkpoint Charlie blocked the CCCP visit was due to a spat of anti-commie rock throwing attacks on the CCCP units, which forced the Soviets to switch from driving busses to using armored cars with armed soldiers.

Despite CCCP units now using fully enclosed BTR-40 armored vehicles and fully armed guards, both U.S. and U.K. forces demanded the Soviets be escorted to the Tiergarten War Memorial. The incident ended on 23AUG1962 after a four hours standoff between CCCP forces, and U.S. and U.K. Military Police.

The standoff between the latest and greatest of U.S. and Soviet tanks was just the small final part of the Berlin Crisis of 1958-61, but it resulted in a new phase; the near isolation of West Berlin for almost three decades!

In U.S. political science U.S. denotes United States. U.S.A. denotes United States of America. USA denotes United States Army. Abbreviations of countries and proper names are punctuated, organizations (even if a government organization), businesses, clubs, etc, are not.

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